How to Clone Weed in a Cup of Water (Easy!)
Did you know you can clone cannabis by putting a piece of a branch in water? Just leave your cup in a warm sunny spot and wait 2-3 weeks for roots to form (some plants take longer or shorter).
Who doesn’t want a bunch of free plants when it’s that easy?
Each of these cuttings is an exact copy of the “mother” plant. As a result, you know that all these clones will grow pretty much the same as each other (and their mum). Cloning is also a great way to produce a lot of plants at once for basically free. If buying seeds is too expensive (and creating your own seeds isn’t feasible), then cloning can make growing a lot more affordable. Cloning via the “cup method” is easy and doesn’t take much space, effort or equipment.
This tutorial will teach you how to make rooted clones like this in a cup of water (it’s easy!)
How to Clone Cannabis with the Cup Method
This section will take you through the process of cloning step by step. First, you will need a few supplies…
- A cannabis plant with at least 7″ long branches (these stems will become your clones)
- Sharp scissors
- Fresh clean water (spring water is great, but any human-drinkable water will work)
- A cup or container to put your clones in
Supplies needed for this cloning tutorial (cannabis plant, scissors, water, and a cup)
Optional but not necessary
- General Purpose or Vegetative nutrients (FloraNova Grow is a great one-part nutrient for vegetative growth) – add to your water at seedling strength, or just give plain water
- Cloning powder and/or cloning gel
The little plants in this picture used to be branches on the plants behind them. Each is a genetic copy of their “mother” plant.
Will using clear cups hurt the roots? I’ve tried cloning in clear and not-clear cups. As far as I can tell, it didn’t seem to make a difference in rooting rates. I would avoid letting direct light shine on the roots and make the water hot, but a little ambient light doesn’t seem to bother them. After trying it both ways, I personally use clear cups so I can easily see the roots as they form, but any cup or container will work.
I’ve cloned in clear cups and opaque cups like this. Both seem to work great!
You can clone cannabis in basically any cup or container. This clone made roots in a glass beaker after being left on the kitchen counter.
Step-By-Step Cloning Instructions
If this is your first time taking cannabis clones, I recommend only taking cuttings from a vegetative plant that hasn’t started flowering yet. A vegetative plant is only growing stems and leaves, but no pistils or buds yet. Plants in the vegetative phase tend to root more quickly and easily. On the other hand, clones taken during the flowering stage may take longer to make roots, and sometimes display odd growth patterns for the first few weeks after rooting. Some people take flowering clones on purpose to take advantage of those growth patterns. This is known as monstercropping but is considered an advanced growing technique.
The goal is to have a rooted clone by the end of the tutorial. Then I’ll show you how to plant your clone in soil, coco, or hydro.
Step 0 – Prepare for cloning
Get all your supplies ready before you get started. Get your plant, your glass of water, your scissors, and put them all in the same place so you can smoothly cut clones and stick them immediately in water.
Prepare your space with your plant, scissors, water, and cups. Don’t forget to label your cup with the strain name!
What about cloning gel or cloning powder? You can dip the ends of stems into cloning gel and/or cloning powder, which may help them root more quickly. Many growers find they help plants root faster, but when it comes to this method, I’ve never really noticed much difference between clones that get dipped vs not dipped. However, it definitely can’t hurt and may help you in your individual environment.
What’s the best water to use? Spring water is my favorite water for cloning (or growing) weed. It doesn’t have all the minerals removed like filtered water or distilled water, and often has a lot less extra random “stuff” than tap water. Plants typically respond well with spring water. That being said, I don’t have the option to use spring water all the time so I use regular filtered or tap water. Our local tap water is not great, with high PH and PPM. Yet it works great for growing and cloning weed as long as I correct the pH. Based on my experience talking to other growers, it seems like nearly all human-drinkable water sources work to grow weed as long as the pH is adjusted to be in the correct range.
If your tap water is good enough to drink, it’s good enough for cup cloning (as long as you correct the pH!)
Should I use nutrients?
You can clone cannabis in straight spring water. However, I personally like to give them a very small dose of nutrients in their water. If you already have nutrients you plan to use during your grow, I recommend using those at what’s listed on the bottle as “seedling strength”. If not, simply use half of what you would use in the vegetative stage. If you’re not planning on using nutrients during your grow (for example if growing in super soil), then it may be easier to stick with plain water for cloning so you don’t have to buy nutrients just for this part.
Step 1 – Identify which branches are at least 7″ (18cm) long on your vegetative plant
For first-time cloners, I recommend cutting clones that are around 7″ (18 cm) tall. That means you need to identify which branches on your plant are at least that long or longer. This size will fit in a typical drinking glass with the leaves able to reach over the top of the glass and “spread their wings” to the light.
Your clones should be big enough to reach over the top of your cup
You can cut a clone that’s shorter than 7″ (I’ve successfully cloned a stem as little as 3″ tall). However, shorter clones typically take longer to root. I had one 4″ cutting that didn’t make roots after several weeks. Out of curiosity, I just let it keep going and refilling the cup as the water level got low. I was amazed when it finally sprouted roots 2 months later. If your stems aren’t long enough yet, follow the tips below to get them to quickly grow longer.
How do I make my plant produce longer stems for clones?
- If the stems on your plant are too short (or there aren’t many suitable clone sites or offshoots), you need to encourage the plant to branch out and give the stems time to lengthen
- If you haven’t yet topped the plant, do it now (cut off the top tip of the main stem). This will cause the plant to naturally bush out and develop more side branches.
- A stem on the plant won’t develop without light. Try to gently open up the plant via bending and tie the tallest branches down so all the small shoots get light and start growing.
- Give strong light to your plant so all the newly-exposed shoots grow quickly
- But not too much light. Make sure to follow the manufacturer’s instructions on how far to keep your grow light from plants. Keeping a grow light too close to the plant can slow down plant growth to a crawl. It also tends to keep branches shorter. Learn how too much light can cause light stress.
- Make sure to deal with any problems so your plant grows as fast as possible
- If you follow these instructions, it should only be a week or two before you have several suitable clone sites.
This stem is 7″ long. Perfect!
What about bigger/taller clones than 7″? You can definitely take big clones. I’ve seen some growers take 12″ (30 cm) clones or even bigger, especially when using an aerocloner. Big clones can root in the right environment and one advantage is the plants are already well developed. If you’ve got long branches and want a bunch of tall plants right away, you can often turn those branches into big clones. However, bigger clones can be more likely to wilt immediately because they have a difficult time getting water to their tallest leaves and branches. The other issue with big clones is they already have a set stem structure. With smaller clones, you have the ability to shape the size and shape of the clone via plant training, which can dramatically increase your overall yields indoors under a grow light.
Step 2 – Trim the branches until there are only the top two pairs of leaves
You’re cleaning up the stems so you don’t have leaves sitting underwater in the glass. It’s easier to clean the sides of the stem now than after the clones have already been cut.
Trim the branches in preparation so they’re mostly smooth
I typically leave the top two pairs of fully formed leaves, but each clone is a little different. Make sure there are at least a few leaves left!
Step 3 – Cut off your clone and immediately put in water
It’s go time! You are about to cut your clones!
Don’t forget to label your cups with the name of the strain because it’s easy to forget which is which.
Try to cut at a 45-degree angle, and make your cut near a node/set of leaves if possible (this may help clones root faster)
Immediately place your new cuttings in water. Don’t wait or the clone may die!
The longer you wait after cutting before putting the stem in the water, the more likely air will get in the stem. Air in the stem causes the clone to immediately droop and start dying. That’s why the new cutting must be put in water immediately (just like when cutting flowers or roses for a vase).
Note: If using cloning gel or powdery, quickly dip the end of the stem first then place in water. Some growers dip in gel first, then powder, then into the water.
Some growers trim the edges of their leaves, especially big leaves. This is because the cutting has trouble getting enough water to the leaves without any roots. That’s why it’s also a good idea to trim leaves if it’s very dry where you live (the leaves evaporate water quickly in dry air, and the plant can’t keep up). It can also help to raise the humidity or use a dome to keep more moisture in the air around clones.
Trim the ends of leaves if they’re big, or if the air is dry (under 30% RH) where you live. Otherwise, feel free to leave them alone.
Step 3 – Place new cuttings in a warm bright spot to make roots
I have a sunny window that gets really warm, and that’s where I like to put the new cuttings. For the first two days, I leave the blinds mostly closed so they’re getting filtered light. After two days I’ll open the blinds and the window so they’re getting direct sunlight for part of the day.
- Keep clones warm and humid. Roots form much slower if the air is cool or dry.
- Give filtered light for 2 days at first so they have time to adjust
- Then move cuttings to a bright spot with direct-but-not-intense light (for example in a sunny window or under a fluorescent grow light)
- If you notice the water level getting low, gently top off with plain water by pouring water down the sides of the inside of the cup
Should I change the water or just leave it alone? Some growers change the water every day when cloning in a cup to help oxygenate the water, but I personally don’t do that and I’ve never had a problem getting roots to form.
This sunny window is my favorite spot for cup cloning. I angled the blinds so these newly-cut clones get filtered light for a few days before getting full sun.
Step 4 – Roots typically form within 2-3 weeks
If you’ve followed all the directions here, your cuttings should stay upright and healthy-looking the whole time. After about 2 weeks you may start seeing roots on some plants.
Plant roots look like little nubs at first
They soon develop into more recognizable roots
It’s normal if you notice the bottom of your stems turn brown. That’s just part of the process.
Different plants/strains root faster than others. I had an Ocean Fruit plant where every single cutting rooted within 10-12 days. That plant apparently loves being cloned via this method. However, certain plants/strains are just harder to clone than others. I had a Durban Poison plant that took 4 weeks before its cuttings started making roots. All the other plants had rooted all their clones before the first Durban Poison clone made roots. So if your clones are taking a long time to root, it may have nothing to do with you.
Most plants will have roots within 2-3 weeks, however, it’s normal for some cuttings to take longer than others even from the same plant. You may have some cuttings show roots at week 2, while others from the same plant show their first roots in week 4. It’s a matter of patience. I personally like taking many more clones than needed so I can keep the ones that root first. Those tend to be the fastest-growing plants anyway!
Pay attention to your clones! I completely forgot about these and when I checked on them the roots were grown together and almost all the water was gone!
If your roots grow together, they often can be untangled. Treat them as if you’re gently untangling a knot in someone’s hair. Tug softly and slowly on first one strand, then the others, giving the strands time to unravel and separate from each other. Don’t pull hard or they’ll break!
Now that you have rooted clones, it’s time to install them into their next home.
Not sure whether to put your newly rooted clones in soil, coco, or hydro? These clones can be used with any grow medium including hydroponics. Once the cuttings have made roots, you install them in your grow medium or hydro reservoir and start treating them like small plants. If you’re looking for a suggestion on the best grow medium for beginners, I’ve had consistently great results with both Coco Loco (soil-based) and Mother Earth Coco + Perlite mix (soilless).
How to Plant Your Rooted Clones in Soil or Coco
1.) Fill your cup half full (or make a 4-5″ deep hole wherever you plan to plant your clone)
2.) Add a little water to the grow medium until it is wet but not soaking, then press down slightly to make a small divet or hole for your roots to fit inside.
When planting your newly rooted clone into a grow medium, you basically want to wet the potting mix first and press down to make a slide indent for your roots.
3.) Gently place your root into the indent you created. If the root is long, you may need to wrap it around in a circle. Avoid using any force, but the roots are pretty flexible.
Having an indent will help keep your roots from touching the sides by giving you an outside “edge” to wrap your roots inside.
If the root is very long, you may need to wrap the root a lot or get creative. Just try to do your best! Once they already have a lot of roots, clones are surprisingly resilient.
If you’re worried about breaking the root, add extra water to the grow medium to make it softer.
4.) Fill the rest of the cup with soil and give a thorough watering.
Try to keep the clone in the middle and upright, but if it’s a little crooked it’s okay. Once the plant is a bit bigger you likely won’t be able to notice.
Try to hold the stem steady in the middle as you fill the cup with soil or coco
Fill to almost the top of the cup with potting mix and then add more water until moist all the way through
5.) Make sure extra water can drain out (plants love good drainage!)
Don’t forget to cut holes out of the bottom so any extra water can drain out. Roots like it wet but not soaking.
I used scissors to cut slits around the edges of the bottom of this cup in order to let any excess water drain out
6.) Give gentle light at first. I leave them in the filtered light of a west-facing window. If you put them under direct light immediately, they can droop or wilt. Once they’ve acclimated to their new home for a day or two and still look happy and healthy, you should be able to start giving them direct light. Within a week it should be growing fast and happy.
7.) Enjoy your new plants!
How to Plant Your Rooted Clones in Hydroponics
Placing these rooted clones in hydroponics is simple and quick. You could plant your clone directly in the clay pebbles, but the following system makes it a bit easier. You probably already have seedling plugs in your grow room if you’re growing with hydroponics.
1.) Get a seedling plug such as Rapid Rooters (or whatever plugs you typically use with your system).
This will be used to hold your clone and keep it anchored where you want.
Any seedling plugs will work to install your clone, but I personally like Rapid Rooters for hydroponic setups
2.) Cut the plug open lengthwise
Take your seedling plug and cut it open lengthwise.
3.) Wrap the plug around the stem of your rooted clone.
Wrap the plug around the stem. This supports the stem so it’s stable and easier to install into a hydroponic system
4.) Install the plug into your hydroponic system just like you normally would. Thread the roots through the bottom holes of your net pot (or cut a hole in your net pot for the roots if they’re too big) and fill in the rest of the way with hydroton to hold seedling in place.
Make sure there is at least an inch of air underneath the very bottom of the stem. You don’t want the water level coming up to the actual stem or it tends to get mushy and hurt the plant (same with seed-grown plants). Whenever growing cannabis in hydro, always give roots some air to breathe before they touch the water. Oxygen makes the plants grow faster and helps prevent root problems. As long as you have lots of bubbles in your reservoir, you should have enough water splashing up on the roots that they stay moist even though they’re above the water line. The roots will grow longer until they’re actually dangling in the water, and that’s when clones really take off!
Once the roots hit the reservoir your plants will take off!
How to Clone Weed in a Cup of Water (Easy!) Did you know you can clone cannabis by putting a piece of a branch in water? Just leave your cup in a warm sunny spot and wait 2-3 weeks for roots to
How to Get Clones from Your Cannabis Plants
Taking cuttings from a strong mother plant allows you to preserve the exact genetic traits of that strain. While it might seem complex, cloning cannabis can be simple, given you use the right techniques and equipment. Here’s everything you need to know!
A comprehensive guide to cloning cannabis plants.
Cloning a cannabis plant sounds pretty futuristic, but it’s actually quite simple; it just involves taking a cutting from one of your plants and giving it time to develop roots. Cannabis growers tend to take clones either from mother plants (which are kept constantly in veg) or young vegetative plants that they’ll later switch to flower.
There are many benefits to cloning your cannabis plants, but the main advantage is it allows you to preserve the specific genetics of a plant almost indefinitely. Best of all, cloning is free!
What Are Cannabis Clones?
Cannabis clones are cuttings taken from a vegetating cannabis plant. Once they grow roots, these cuttings turn into plants with the exact same genetics as the plant they were cut from.
When you buy cannabis seeds from a respected seed bank, each seed will contain the genetics of both its mother and father. Once you germinate your seeds, however, you may find that your individual plants (or phenotypes) look quite different. That’s because they may express the genetics passed down from their parents in different ways, just like you might look very different from your siblings.
Hence, if you find a plant with particular characteristics (smell, taste, yield, size, etc.) that you love, cloning it allows you to preserve those genetics, grow after grow. If you have any lingering doubts about the process, take a look at the benefits of growing cannabis clones versus seeds.
Choosing the Right Mother Plant to Clone From
Cloning is really about capturing the best attributes of a particular strain. As such, you want to be pretty selective about which plants you take your clones from.
Ideally, you’ll want to clone a plant that you absolutely love. If you germinate a bag of seeds, keep an eye out for that one plant that just seems to top its siblings; the one that grows the fastest, looks the strongest, smells the best, or yields the most. That’s the strain you’ll want to clone.
Some traits growers tend to look for in mother plants include:
- Exotic or pungent aromas
- Sweet, smooth, and bold flavours
- High potency and resin production
- Manageable heights (when growing indoors) and robust growth
- Fast flowering time
- Resistance to pests, moulds, and other pathogens
- Large yields
When growing from seeds, some growers opt to take clones from all their plants while they veg. Then, once these first plants are harvested and dried, they only keep the healthiest clones from the one plant they liked the most.
On the other hand, it’s also possible to only take clones from those vegging plants that stand out in any of the areas mentioned above. Unfortunately, it can be hard to determine the aroma, flavours, and potency of a strain so early on, which is why we recommend taking clones from all your plants, then culling those you don’t want post-harvest.
What Do You Need to Clone Cannabis?
- A healthy vegging “mother” plant
- A clean scalpel, razor, or sharp scissors
- Starter cubes (Rockwool, etc.)
- Cloning gel or powder
- “Mild” lighting for your clones: a low-wattage CFL or a special light for clones/seedlings is ideal
- High-proof alcohol to disinfect your tools
- Propagator (optional), which comes complete with everything you need to create the perfect microclimate for your clones
How to Take a Cannabis Clone
When it comes down to actually taking your cuttings, there are a few key factors to keep in mind.
Choose the Right Rooting Medium
To help your clones develop healthy roots, we recommend planting them in a well-aerated medium that retains plenty of moisture. For best results, we recommend using Rockwool cubes (made from molten rock that’s been spun into a fine thread), as they allow for plenty of airflow and provide great moisture retention. Make sure to also invest in a plastic tray (which will hold the cubes and help them retain some water) and a dome or propagator to retain humidity around your clones.
Prepare Your Tools
Cleanliness is the key to taking and growing healthy clones. Hence, make sure to wash your hands and use gloves before handling your plants, and sterilise your razor, scalpel, or scissors as well as your work area with high-proof alcohol.
When you take cuttings from a plant, both the mother and cuttings are at a higher risk of developing infections from the bacteria in their environment. Washing your hands and sterilising your equipment will minimise the risk of these bacteria causing your cuttings (or worse, your mother) any problems.
Prepare Your Medium and Rooting Gel
Once you’ve taken a cutting from your mother plant, you’ll need to act quickly. You don’t want to leave the inside of its panch exposed to the elements any longer than is absolutely necessary. To help speed up the cloning process, we recommend setting up your work area before you make the cut, with your rooting gel and medium ready to go.
Also, we recommend lightly moistening your medium before you start cloning. Just remember not to overdo it; clones like high humidity and a slightly moist medium, but they’ll rot in a medium that’s drenched.
Select a Cutting
You can technically take cuttings from both vegging and flowering cannabis plants. However, cuttings taken from a flowering plant may take longer to root and tend to exhibit slower growth. They’ll also need to be reverted back to veg for about 2–3 weeks before you can flip them into flower again.
Cannabis clones are best taken from the tip of a healthy panch. Remember, the healthier the cutting, the faster it will root and grow. We generally recommend taking cuttings from the bottom panches of a plant, seeing as they typically receive less light and will produce smaller buds. Make sure your cuttings have at least two nodes.
Make the Cut
To take a clone from a cannabis plant, make a clean cut at a 45° angle below the last node of your cutting. This will increase the area of the rooting surface, helping the panch develop more roots and grow more quickly.
Once you’ve taken your cutting, dip it into your rooting or cloning gel and stick it straight into your medium. Once secure in the medium, remove your clone’s bottom leaves (leaving only the top fan leaves and growing tip intact). Finally, trim the tips of the fingers on the clone’s remaining leaves to promote photosynthesis and water uptake. This reduces the surface area of the remaining leaves and also slows evaporation, helping your young clones hold on to more water as their roots are developing.
If you’re a beginner grower, we recommend taking one clone at a time. If you’re more experienced, however, you can take multiple cuttings from a mother and keep them hydrated in a glass of non-chlorinated water until you’re ready to dip into your rooting agent and move them into their medium.
Place Your Clone in Its Dome
Once your clone has been planted and trimmed, it’s time to move it into a dome. This will allow you to keep humidity levels high (clones need high humidity as they absorb water via their leaves as they develop their roots). Once you’ve situated them in a dome, keep your clones on an 18/6 light cycle (18 hours on, 6 hours off) under a low-power fluorescent or metal halide lamp.
If you’re looking for a complete kit to help you grow both healthy seedlings and clones, we highly recommend investing in a **propagator. While they’re typically used for seedlings, this simple accessory also offers the perfect environment for your fragile clones.
Check In on Your Clones Daily
From here on out, you’ll want to check on your clones daily to monitor their health and ensure they have enough water to fuel their growth. If the humidity in your dome or propagator drops, spray the leaves of your clones lightly with unchlorinated water. Also, if some of your clones die (which is common), remove them immediately so they don’t rot and cause mould to spread to your other clones.
Clones can take between 10–14 days to develop roots, but some may take longer. Once a clone has developed 3–5cm roots, they are ready to be transplanted.
Transplant Your Clone
To transplant a clone into soil, remember to work in a sterile environment and prepare your pots with moist soil beforehand. Then, use gloves to gently remove your clones from their medium and plant them (remember to completely cover your clone’s roots).
How to Clone Cannabis in Rockwool
- Soak your Rockwool cubes in slightly acidic water (we recommend a pH of 5.5) for 2–3 hours.
- Make small holes in the middle of your cubes using a pair of sterilised scissors.
- Take your cutting following the instructions listed above.
- Dip your clone into your rooting agent and secure it in the hole of a soaked Rockwool cube.
- Place your clone in your propagator or dome and lightly douse it with some water to keep humidity high.
How to Clone Cannabis in Soil
- Prep your soil and pots. We recommend using a light potting mix with perlite (at least 25–50% by volume) and plastic party cups as your pots. Don’t use fertilised soils as they will burn your cuttings.
- Soak your soil lightly and let it drain.
- Take your cutting, dip it into a cloning agent, and stick it straight into the soil.
- Lightly pat down the soil around your clone’s stem to hold it in place.
- Move your cutting into a propagator or dome and spray it with water to boost humidity.
Note: When cloning in soil, you can keep your plants in their pots until they’ve outgrown them (this can take 3–4 weeks or more, depending on the size of your starter pots and your cutting’s rate of growth). If you’re using plastic cups as pots, transplant your clones once their roots start to reach the sides of the cup.
How to Clone Cannabis in Water
If you don’t have access to soil or Rockwool, you can clone cannabis directly in water.
- Fill a container (a tall, narrow glass or plastic bottle will work fine) with unchlorinated water (with a pH of around 5.8–6).
- Take your cutting, dip it in rooting gel, and place inside your container of water.
- Change the water every 2–3 days to prevent bacteria and/or algae from forming around your clones.
Can You Clone Cannabis Without Rooting Gel?
This is a very common question that we get from both amateur and more experienced growers. And the answer is yes, it is possible to clone cannabis cuttings without using rooting gel or any other kind of rooting hormone. In fact, some advanced growers prefer to clone without the use of these hormones, instead letting their plants develop roots naturally on their own.
If you want to try your hand at cloning cannabis without rooting gel or hormones, try the following:
- Prepare an opaque container with unchlorinated water.
- Take your cutting and immediately put it inside the water. Trim its lower leaves so they are not sitting in the water.
- Place the cutting on a windowsill, away from direct sunlight.
For the best possible results, keep your room temperature at 23–25°C. Roots will form in about 8–10 days, and some clones will be ready to transplant after 2.5–3 weeks, but this can vary considerably. You’ll know your clones are ready to be planted once they’ve developed roots that are at least 3–5cm long. You can also add ground-up aspirin or vitamin b1 to the water to help your plants root faster.
Caring for Cannabis Clones
Cannabis clones are fragile and need the right care to survive. Most importantly, your clones need the right temperature and humidity to produce good results.
Creating the Perfect Environment for Cannabis Clones
Clones thrive at temperatures between 23–25°C (74–78°F) and a relative humidity between 75–85%, regardless of the medium you’re cloning them in. There are a number of ways you can keep things warm and humid to help your clones develop healthy roots as fast as possible:
- Use a heat mat underneath your cloning tray or propagator to keep temperatures optimal in cooler conditions.
- Add perlite at the bottom of your tray to retain moisture.
- Spray your clone’s leaves and the inside of your tray/propagator with water right after cloning to boost humidity.
- Use a thermometer/hygrometer to measure the temperature and humidity level in your clone tray.
- Check in on your clones every 24 hours to make sure their environment is perfect.
- Remove any dead clones from your tray or propagator immediately. Decaying plant matter attracts bugs into your grow area and creates a breeding ground for fungi and other nasty pathogens that can quickly kill off your remaining clones.
How to Water Young Cannabis Clones
Remember, young clones don’t have roots, so watering their medium isn’t going to do much good. Instead, water your young clones by lightly spraying their leaves a couple of times per day. Only water your medium if it’s becoming dry; never soak it or water it as you would a regular plant.
Lighting Requirements for Cannabis Clones
Clones will burn under strong grow lights or direct sunlight. For best results, keep your cannabis clones under CFL bulbs placed roughly 10cm from the tops of the young plants. Alternatively, keep them on a windowsill out of direct sunlight.
Also, remember that your plants will need at least some darkness for their roots to form. While some growers use different light cycles for their clones, we always recommend sticking to an 18-6 vegetative cycle.
Minimising the Risk of Mould and Other Pests
As mentioned above, cannabis clones enjoy warm, humid conditions. Unfortunately, high humidity and warmth can also attract pests, fungi, and nasty bacteria into your grow space. To prevent these pathogens from destroying your clones, always use sterile equipment and keep your temperature and humidity within the suggested range.
Additional Tips for Cloning Cannabis Plants
To close out this guide, let’s address some of the most frequently asked questions regarding cannabis clones. You can refer to these tips as needed throughout the cloning process so you can set yourself up for success!
Q: Why Are My Cannabis Clones Turning Yellow?
A: Cannabis clones will naturally yellow over time as they gradually use up nutrient stores in their leaves. Some yellowing usually isn’t a problem as long as your clones root properly. If a large number of your clones are turning yellow before they can develop roots, this could be caused by high humidity and/or temperature issues. If your temperature and humidity levels are spot on, check the size of your clones; they should only have 2–3 nodes, and you’ll want to trim off any of their bottom leaves.
Finally, if you still find that too many of your clones turn yellow, you may want to switch to another cloning method and see if your results change. Some growers find they’re more successful cloning with one method than another.
Q: Why Are My Cannabis Clones Wilting?
A: There are countless causes behind wilting cannabis clones. If you spot any signs of wilting on a young clone, you’ll want to act quickly; remember, these plants are very fragile and can’t handle a lot of stress. More often than not, clones will wilt if they’re not getting enough water.
Start by checking the temperature and humidity levels in your dome, adjusting them if they’re not optimal. As they work to develop their roots, clones take up water through their leaves via transpiration (just like seedlings). It’s vital your temperature and relative humidity levels are on point for plants to transpire properly. Trimming the tips of your clone’s leaves also helps it retain water.
Also, remember to check your lights and ensure they aren’t too far from your plants. Poor lighting can affect a clone’s ability to photosynthesise, causing it to wilt (see “Lighting Requirements for Clones” above).
Q: When Should You Transplant a Cannabis Clone?
A: We recommend transplanting your clones once they’ve developed strong roots that are at least 3–5cm long. Cuttings usually take between 10–14 days to develop roots, but this varies greatly from one strain to another.
Q: Why Are My Cannabis Clones Drooping?
A: New cuttings naturally droop after being taken from a mother plant. It’s just part of the plant’s response to the stress of being cloned. Once they’ve developed roots, your clones should naturally spring back up and reach for the light.
If your clones continue to droop, go back and check the temperature and relative humidity in your dome, as well as your lights. Also, make sure you haven’t left too many leaves on your clones. Remember, we recommend leaving clones with just their top two leaves. If you’ve checked all of these variables and they’re on point, try to prop up your cuttings to avoid them touching their medium and getting soggy.
Q: Can Cannabis Clones Turn Male?
A: No, female cannabis clones cannot turn male. They can, however, turn hermaphrodite. This can be the result of stress or genetics. For example, if your mother plant tends to show hermaphroditic qualities, those genes will be passed down to your clones as well.
Q: How Do You Make Cannabis Clones Root Faster?
A: It takes time for cannabis clones to develop roots, and there’s no real way to hurry the process along. However, by creating the perfect environment, being clean and fast, and using a quality rooting gel, you can maximise the health of your clones so they can develop a strong root system.
Start Cloning Your Cannabis Plants!
Cloning cannabis can seem like a daunting process, especially for inexperienced growers. But it doesn’t need to be; with a strong mother, a good cloning process, and clean equipment, you can replicate the same plants—and the same bud—time and time again. Remember to keep this article on hand whenever you’re cloning to simplify the process!
Got a particular cannabis strain you'd love to clone? Click here for a detailed overview of everything you need to know about cannabis cloning.