Planting Weed Seeds Straight Into Soil

The Beginner’s No-Fail Guide to Starting Seeds Indoors If you’re new to seed starting, this foolproof beginner’s guide to starting seeds indoors will take you step by step from seed to harvest, There are various ways to approach outdoor cannabis growing. We take a brief look at the pros and cons of each method so you can decide which way of growing cannabis outdoors suits you best.

The Beginner’s No-Fail Guide to Starting Seeds Indoors

If you’re new to seed starting, this foolproof beginner’s guide to starting seeds indoors will take you step by step from seed to harvest, quickly and easily. You don’t need any fancy gear or grow lights to get started, and you can even upcycle small containers to put your seeds in. All that’s needed is a sunny window, a basic seed-starting mix, and something underneath your pots to catch drips.

Exactly as the title says — this is an easy, no-fail guide to indoor seed starting.

You don’t need to read any gardening books first. You don’t need any fancy equipment. You just need your seeds (these are the best garden seed catalogs that I order from every year) and a few basic supplies to get started.

Whether you have a dedicated vegetable bed in your backyard, or a cluster of containers on your patio, it all starts out the same way. You have to plant your seeds, and germinating seeds inside your home (where you have the most control) is the best way to do so.

Starting seeds indoors is ideal if you want to get a head start on the season, or if the weather is still too hot or too cold to put anything in the ground.

This simple step-by-step tutorial will take you from seed to seedling with a minimum of fuss. Just the stuff you need to know, and none that you don’t. (But if you’re the really-need-to-know type, I’ve added footnotes at the end to explain why you’re doing what you’re doing.)

Disclosure: All products on this page are independently selected. If you buy from one of my links, I may earn a commission.

How to start seeds indoors: a step-by-step guide

Step 1: Gather your seed starting supplies.

  • Seeds
  • Seed starting pots or cell trays
  • Plant markers
  • Seed starting mix (homemade or store-bought)
  • Seed tray with humidity dome (often called a 1020 plant tray or propagation tray, or use any DIY drainage tray with plastic wrap)
  • Spray bottle or squirt bottle filled with water

If you’ve already made your recycled newspaper pots, you’re all set. If you’ll be using other seed starting pots or cell trays, make sure they’re clean. 1

You can also repurpose household items into seed starting containers, like egg cartons, Dixie cups, and yogurt cups. Just wash them out and poke a few drainage holes in the bottom with a nail or an awl.

Step 2: Fill your pots or trays with seed starting mix.

Dump your seed starting mix into a large tub or bucket, pour in a generous amount of water, and stir it up with your hands or a trowel.

As the seed starting mix starts to absorb the moisture, add more water as needed. (This will take several minutes, as peat-based seed starting mixes are slow to absorb.) You want the mix to be uniformly damp, like wet sand.

Fill your seedling pots with this pre-moistened seed starting mix. 2

Step 3: Sow your seeds.

Place two to four seeds on the surface of the seed starting mix, and gently press the seeds down so they’re nestled in nicely.

If your seeds are very small, like basil or mustard, you can leave them uncovered. 3

If your seeds are larger (like beans or peas) or they require darkness to germinate (check the instructions on the seed packets), cover them with a layer of vermiculite or seed starting mix equal to their height, usually 1/4 inch to 1/2 inch.

Step 4: Label your newly planted seeds.

Label each pot. Trust me, you will never remember what you planted where, as most seedlings look the same at birth.

At this early stage, cheap plastic plant markers work very well and stay out of the way, so save your big and beautiful metal plant markers for the garden.

Step 5: Keep your seeds moist and warm.

Mist your seeds with water. 4

Assemble your pots in a seed tray (or reuse a disposable aluminum roasting pan, a baking pan, even that plastic clamshell that your salad greens came in) and cover with a humidity dome (or just plain old plastic wrap). 5

If your dome has vents, keep them open to help with air circulation during the sprouting period.

Now, you need to add heat. Since sunlight is not essential at this point, your seed trays can be placed wherever it’s warmest in your house, such as an attic, bathroom, laundry room, or kitchen. 6

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If your seedling pots stay covered in a warm nook, the low humidity will keep your seeds happy until they sprout. High humidity will make them sad. Only spritz the seeds with more water if the mix feels dry to the touch. 7

Within a couple of days to a couple of weeks, the seeds will germinate. As your seedlings start to emerge, some of them will look like they’re wearing little seed hats.

Germination (the process of a seed sprouting) is highly variable, so don’t stress if it feels like it’s taking forever to happen. In most cases, seeds will germinate within three weeks (after that, try starting a new round of seeds).

Step 6: Give your new seedlings light.

At this stage, the newly germinated seedlings need light. Remove the humidity dome or plastic wrap, and move the seedlings to the sunniest spot in your house (preferably a south-facing window).

Continue to keep the mix moist, but not overly wet. Seedlings should be watered once a day or every other day, depending on how much sun and heat they get.

Remember that seedling roots are fairly close to the surface and they’re growing in a small amount of media, so they don’t need a deep soak the way larger plants do.

I like using spray bottles or squirt bottles, as the gentle streams of water won’t displace seeds or damage seedlings.

Step 7: Moving day! Transplant the strongest seedlings when they’re ready.

After your seedlings develop their first “true set” of leaves, they are ready to be transplanted. 8

If more than one seed sprouted, choose the strongest one and pinch or snip off the others. You can even keep all of them, but be careful separating the roots if the seedlings are close together.

Transplant the seedling into a larger container filled with potting mix. Hold it by the cotyledons (the first leaves that appear) and try not to manhandle the tiny roots.

At this stage, you can lightly drench the potting mix using a diluted solution of compost tea or all-purpose fertilizer. Keep it simple, keep it organic, and don’t obsess too much over the nutrients. 9

Give the seedling plenty of sunlight each day (at least 12 to 16 hours is optimal for most vegetable seedlings) to avoid the “leggy” look. (Learn how to fix leggy seedlings if this is happening to you.) 10

Step 8: Harden off those seedlings.

To get your seedling prepped for a good life outside, you can start to harden off the seedling 11 by moving it outside under diffused light for a few hours and bringing it back inside each night.

Over the next week, move it from diffused sun to partial sun to full sun, and for longer periods of time, until it’s finally kept outside all night.

Step 9: Transplant your seedlings outdoors.

After the hardening off period, you can transplant your seedling to its final destination, whether straight into your garden or into a larger container.

And then, in a couple of months, you can enjoy the fruits (and veggies) of your loving labor!

More Ways to Start Seeds Indoors

There’s more than one way to start your seeds and make sure they sprout!

Germinate Seeds Quickly With Coffee Filters or Paper Towels

Whether you’re trying to start tricky seeds with long germination times, or find out if your old seeds are still viable, the coffee filter (or baggie) method is a quick and simple way to start many seeds at once in a small space.

How to Start Seeds in Eggshells, Save Money, and Have Fun

Save those cracked eggshells, upcycle your egg carton, and bookmark this indoor gardening DIY for a rainy day. Starting seeds in eggshells is a fun and easy project that kids will delight in helping with!

How to Soak Seeds to Speed Up Germination Time

If you’ve had trouble with seeds not sprouting, soaking them in water before you sow them can greatly increase their chances of germinating. This method works well with legumes, beets, squash, and other thick-shelled seeds.

How Long Do Seeds Last? (+ Cheat Sheet on Seed Expiration Dates)

How old is too old? All seeds have a shelf life, but their longevity depends on the quality and condition when you bought or saved them, and how they’ve been stored since. Find out whether you should keep or toss your seed stash.


1 This seems obvious, but laziness gets the best of us. Clean pots are key and help keep damping off at bay (an untreatable fungal disease that causes seedlings to suddenly keel over and die at the soil line).

Discard or thoroughly wash any pots that previously housed diseased plants. Avoid using leftover soil from the nursery container you brought home, as it might harbor weed seeds and bad bacteria.

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If you have a healthy garden, you can skip washing your pots and simply dump out the dirt from your pots before using again.

I’ve put countless seed trays and humidity domes to the test over the years, and found these trays and domes to be the thickest and strongest on the market — they don’t bend, flex, or crack as easily as other brands, and can be reused for many seasons. back

2 It’s easier to start with pre-moistened mix, as peat-based mixes are harder to wet down uniformly if they dry out in pots. Although peat has a very high water-holding capacity once it’s wet, it actually repels water when it’s dry. Go figure.

If you’re not using homemade seed starting mix, this is a reputable brand that I like. You do not need anything fancy; seeds just need a basic mix of perlite, vermiculite, and peat moss (or coco coir) to germinate and grow into healthy seedlings. back

3 For certain varieties of plants, light will often speed up germination (the process of a plant sprouting from a seed). back

4 The moisture will help the seeds shed their protective coating and eventually sprout. back

5 This creates a greenhouse effect to keep your seeds moist and warm, the key to germination. Most annual vegetables germinate best in temperatures of 75°F to 90°F. A few, such as radish, will germinate at lower temperatures.

Seeds will sometimes sprout in less than ideal temperatures, but the germination period will be longer. back

6 I like to put my seed trays next to my heating vent on the floor. Some gardening guides suggest placing your tray on top of a refrigerator, but most appliances these days are energy-efficient and do not give off much heat. back

7 Too much water will make the seeds rot. If your makeshift greenhouse is looking a bit too wet inside, remove the cover or plastic wrap for a few hours during the warmest part of the day to allow air circulation. Mold is no good for seeds, either. back

8 The true leaves are actually the second set of leaves that appear; the first leaves that initially unfurl are not leaves at all, but cotyledons. These leaf-life structures are part of the embryo of the seed, and supply food to the seedling until its true leaves begin the process of photosynthesis. back

9 I like to use home-brewed compost tea or liquid sea kelp. No fertilizer is fine, too, especially if you start with good soil. I have grown healthy vegetables with no fertilizer through a whole season, and could barely keep up with the harvests. back

10 It sounds sexy, but it makes your seedling tall and weak as it channels its energy into straining for sunlight. I also like to gently run my hands across the top of my seedling to simulate a breeze; this slows down initial growth and strengthens the stem. A few brushes a day is all it needs. back

11 Hardening off is the process in which you gradually acclimate the seedling to its future environment outdoors… getting it acquainted with the breeze, the birds, and the bees. back

Growing cannabis outdoors: pots or open soil?

There are various ways to approach outdoor cannabis growing. Some growers prefer to simply sow seeds or plant seedlings straight into the open ground, while others prefer containing their plants within planters or pots. Here, we take a brief look at the pros and cons of each method.

Growing Cannabis outdoors in pots

1 – One of the most obvious pros of growing outdoors in pots is the fact that your plants are therefore easily transportable. This provides a degree of flexibility to the grower that planting straight into the soil simply does not afford.

For example, if living in an area of occasional extreme weather, the ability to carry your plants to a sheltered spot can be a huge advantage. Leaving plants at the mercy of gale- or hurricane-force winds, driving rain or sleet, or golfball-sized hailstones can be disastrous, and months of hard work can be ruined in one night.

Similarly, if you are growing at a time of year where hours of daylight are not optimum, moving your plants to an artificially-lit room (or a dark room if days are too long to induce flowering) can mean the difference between a good harvest and a non-existent one.

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2 – Another advantage of growing outdoors in pots is the ability to control the growth rate and eventual size of your plants, which can be highly useful if concealment is an issue.

Some varieties of cannabis (particularly sativas and sativa-dominant hybrids) can easily exceed two metres in height, meaning that if nosy neighbours are taking an interest, your plants will be easy to spot and identify.

Containing your plants in pots ensures that once they have run out of space for the roots to occupy, they will cease vegetative growth.

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3 – A third advantage of growing in pots is the ability to control the uniformity and quality of the growing medium, and to fix any problems that may arise by simply transferring to a new pot with new soil.

You can be certain that your pots contain only what you put in them, and that no mixing with native soil has occurred. This may also go some way towards controlling unwanted pests and bacteria, although in an outdoor environment total control of this aspect may be difficult.

1 – On the other hand, containing plants in pots may be undesirable for the very fact that it restricts growth, thereby reducing potential harvest and general overall health of the plant. Of course, there are some huge pots available for outdoor cultivation, but if you truly wish to maximize the potential of your large plants, restricting their access to soil is not the way to go.

2 – Another potential problem lies in the fact that plants are transportable in pots—it’s a definite advantage for many outdoor growers to be able to move plants indoors or into a greenhouse if necessary, but the fact that you can pick them up and carry them around also means that other, less well-intentioned people can do the same.

If your site is very remote and there is little chance of trespassers discovering your crop, this may not be an issue, but for many back-garden growers in villages and towns the world over, theft is a very real concern.

3 – Another possible disadvantage is the need for more regular and meticulous maintenance when plants are in pots. Hand-watering is typically essential, as even if your pots are in a position to receive water from precipitation, they will not have access to the groundwater or moisture held within the topsoil—which for plants grown in open soil, can potentially entirely negate the need to water by hand.

Growing cannabis outdoors in open soil

1 – The most obvious advantage of sowing seeds or planting seedlings in open soil is the fact that they have full, unrestricted access to nutrients and whatever moisture can be reached by the roots. As the roots are able to freely grow downwards, they may be able to fulfill their water requirements purely from the groundwater.

This ensures that your plants can achieve their full potential in terms of height, vigour and eventual yield, and also means that less maintenance is required. If conducting a ‘guerrilla grow’ in a site that is not easily accessed on a daily basis, open soil is often preferred for this reason.

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2 – Another potential advantage of growing in open soil is reduced set-up cost. While purchase of pots is not generally going to break the bank, keeping costs low is generally a good thing, from the smallest hobby-gardener to the biggest criminal outfit.

When factoring in the fact that growing in pots generally necessitates the need for several transplants throughout the plant’s life into incrementally bigger pots, cost of pots alone can run into the low hundreds for a small grower, and possibly even thousands for large-scale growers.

1 – Of course, growing cannabis outdoors in open soil means your plants are not transportable, which is an advantage if theft is an issue, but can also be a great disadvantage.

Non-transportable plants means that you are at the mercy of the weather and season—if thunderstorms, gales, or floods occur, your plants may well not survive them, unless you are able to construct screens or wire cages to protect your crop from the worst of the severe weather.

2 – Furthermore, if your plants cannot be moved, they must be grown only at favourable times of year, as they cannot be moved into a well-lit or completely dark space if natural daylight is preventing them from flowering or from vigorous vegetative growth.

3 – Another big concern with growing cannabis outdoors in open soil is the quality and uniformity of soil. Most growers opting for this method will make great effort to ensure that the soil is appropriate in terms of drainage, consistency, and pH, and will often mix the soil with additives such as lime (to increase pH), sand (to improve drainage), or manure (to increase available nutrients).

However, without an impenetrable barrier between your plants’ soil zone and the native soil, these efforts can be negated—by agricultural runoff contaminating your soil zone with toxic chemicals, for example.

Laws and regulations regarding cannabis cultivation differ from country to country. Sensi Seeds therefore strongly advises you to check your local laws and regulations. Do not act in conflict with the law.