Feminized cannabis seeds Feminized cannabis seeds first appeared in the 1990’s, they were invented by Dutch Passion and feminized cannabis seeds now account for 95%+ of all cannabis seeds sold. Cannabis flower is grown from female plants. Seedsman looks at how to create feminized cannabis seeds to ensure your plants almost always turn out to be female Learn the easiest way to make feminized seeds for your grow step-by-step. It’s not as rocket science-ish as you might think.
Feminized cannabis seeds
Feminized cannabis seeds first appeared in the 1990’s, they were invented by Dutch Passion and feminized cannabis seeds now account for 95%+ of all cannabis seeds sold.
Regular cannabis seeds produce male and female plants in roughly equal numbers. But today regular cannabis seeds account for under 3% of Dutch Passion seed sales, even though our 15 varieties is one of the most complete collections of regular cannabis seeds still available. Most home growers simply do not like to use their time, space and electricity growing male cannabis plants. Most home growers prefer to grow a small number of high quality female plants, and the best way to do that is from cuttings (clones) or from feminized cannabis seeds , which are usually bought online or from the local seed shop.
How were feminized cannabis seeds created?
Back in the 1990’s Dutch Passion’s founder, Henk van Dalen , was growing some cannabis plants from regular seeds, they were the only type of cannabis seed available at the time. Cannabis growers had dreamed of feminized cannabis seeds, but it was generally accepted that it was not possible for cannabis. One day Henk noticed something unusual when studying some female plants which had been left to flower for several weeks longer than usual. It was one of those experiments just to see what happened if a female was left to bloom for much longer than anyone would normally think about. It was an experiment that would change cannabis growing forever, because he noticed the female plants eventually produced male flowers. Henk collected the pollen and used it to pollinate some other female plants and a few weeks later he collected the seeds which had formed. Again, it was one of those experiments done ‘just to see’ what happened.
The seeds were planted, and to everyones astonishment every seed produced a female plant. There was huge eagerness to try to understand it, and perhaps a chance to repeat the experiment and see if this discovery could be put to a practical use. So more female plants were grown from regular seed, and sure enough several weeks after the normal harvest date, the females began to produce male flowers. The pollen was carefully collected, Henk called this ‘female pollen’ because the seeds created from it only gave rise to female plants. This larger, second experiment confirmed the initial findings. Feminized cannabis seeds had been created at Dutch Passion, though at first not everyone believed it.
The process of collecting ‘female pollen’ from over-ripe female cannabis plants was not suitable for mass-production of seeds. Today each seed company has their own preferred chemical way of creating ‘female’ pollen to use in the creation of feminized seeds.
Today, feminized cannabis seeds are vital to growers of all kinds. Feminized autoflowering cannabis seeds are becoming almost as popular as photoperiod seeds, they are an easy and convenient way to grow cannabis both indoors and outdoors. Many first time cannabis growers choose feminized auto seeds because they are so easy and flexible to grow.
Feminized CBD-rich cannabis seeds are popular with medical growers. Many outdoor growers also rely on feminized seeds, without them they would risk male plants pollinating the entire crop.
Regular seeds are popular with some old-school growers and small scale seed banks. Dutch Passion’s regular seed sales are so low that we regard it as a service rather than a viable business. For most growers, feminized seeds are the preferred way to grow your own cannabis.
How To Feminize Cannabis Seeds
If you’re a home grower who grows your cannabis from seed, you need those to be female seeds. In this article, we’ll explain why and also how to feminize cannabis seeds.
Table of contents
What Are Feminized Cannabis Seeds?
Cannabis plants are dioecious beasts, meaning they can be male or female. Although they look the same in the early part of their life cycle, there are marked differences between the two. Male cannabis plants produce male seeds and pollen sacs and have much lower potency than females. For that reason, most people involved in cannabis cultivation want to grow female cannabis plants. Females produce the much sought-after buds that cannabis is harvested for. They’re high in cannabinoids and terpenes and have all the trichomes and other components you need for medical or recreational cannabis use.
Why Make Feminized Cannabis Seeds?
As opposed to regular cannabis seeds, which produce female plants approximately half of the time, feminized seeds only produce females. That means every plant grown from feminized cannabis seeds will be a female, bud-bearing beauty.
Growing cannabis plants from feminized marijuana seeds takes the guesswork out of the gender game and guarantees your plants will be female.
Nowadays, almost all strains of cannabis are available in feminized seed form. This is because seed banks understand that most people buying seeds are more interested in producing cannabis flower. As such, the option to do so is available – although, if you’re a breeder and want to create a breeding programme, these seed banks also sell regular seeds of many popular strains.
How Do You Make Feminized Cannabis Seeds?
The general idea of the feminization process involves forcing female plants to produce pollen. That pollen is used to pollinate other female cannabis plants, resulting in feminized seeds.
There are two main ways to achieve this:
1. Chemically-induced pollen feminization
Of these two options, it’s far better to go chemically-induced. This method is used by professionals and has a significantly higher success rate. It also has a much lower frustration rate than the latter method. Rodelization creates feminized seeds through stress and, as such, can be a risky endeavour that increases the likelihood of hermaphrodite plants – and you don’t want hermie plants.
Marijuana plant and Cannabis seeds in a plate
So how do you feminize cannabis seeds with chemicals? There are several techniques and chemicals that you can use. The main ones are Colloidal silver, silver nitrate, silver thiosulphate, benzothiadiazole, and gibberellic acid. Of these options, colloidal silver is the easiest to get a hold of, but you can also make it yourself without too much difficulty.
Colloidal silver is a solution comprising tiny – microscopic particles of silver suspended in distilled water. It’s sometimes used as a dietary supplement, meaning it’s reasonably easy to get a hold of. You can buy it on Amazon or from health shops. Disclaimer: Never ingest colloidal silver as a dietary supplement without speaking to your doctor beforehand.
Colloidal silver has other uses in horticulture, including as a means of fungal control. In creating feminized cannabis seeds, colloidal silver works by inhibiting the production of ethylene, a naturally occurring hydrocarbon gas. Ethylene is a hormone needed to produce female flowers, so we use colloidal silver to prevent ethylene from effectively making plants female. The result is that the male hormones dominate, producing male flowers. Afterwards, you collect the pollen from the plant and use it for pollinating other plants, producing feminized seeds. Colloidal silver guarantees you consistently get feminized seeds.
The Colloidal Silver Method: Step by Step
- Begin by acquiring the right strength of colloidal silver, preferably 30ppm (ppm meaning parts per million). It’s available in other concentrations, and 30ppm seems to be the best for the job. Lower than 15ppm will result in male sacs with next to no viable pollen, so go with a higher concentration.
- Select a plant that has the traits you wish to preserve. Put it into a small pot away from your grow room and give it a day or two to adapt, then put it on a 12/12 light cycle as soon as possible. If using a clone, you’re good, but if you’re growing a plant from seed, wait until the plant has sexed before treating it with colloidal silver. You need to make sure it’s female!
- Once it begins the flowering stage, spray the plant, or plants, three times a day with colloidal silver, giving them a good soaking. Repeat this process over two weeks, and then leave them to grow as usual.
- When sexing begins, your plant will develop sex organs – look for male pollen sacs on the bud sites rather than the calyxes and pistils seen in female plants. Look for little green balls appearing first at the top and then lower down the plant. Viable pollen appears within three to four weeks once the plant has been sexed. Collect the pollen and use it to pollinate other female plants. These plants will then yield feminized seeds.
- Keep your treated plant isolated well away from females. If a pollen sac should burst, it will release millions of spores, and you don’t want them near your girls.
As soon as you’ve collected the pollen, discard the plants. Do not smoke them, and do not be tempted to try and rinse the colloidal silver off. Silver is a toxic metal, so never smoke the plant. Colloidal silver is absorbed into the plant’s foliage, and that plant is no longer fit for consumption. Toss it in the trash immediately.
Five Best Feminized Cannabis Seeds For Sale
We’ve never made any secret that Blue Dream is one of the finest elite strains we offer. By crossing Blueberry Ice with a Haze, you get a high-yielding 70% photoperiod sativa strain of superb quality.
It’s a fairly easy strain to grow and performs well indoors or out. Blue Dream can yield as much as gm/m2 indoors, whereas outdoor cultivators can expect up to 850 gm/plant. Blue Dream is a high-THC strain that produces up to 20% THC on its sparkling, resin-covered crystals.
As a sativa, it’s a tall plant that tops out around 350cm in height when grown outdoors, and with a flowering time of around 10 weeks, you won’t have too long to wait for this wonder weed.
Blue Dream is high in alpha-pinene, a monoterpene with therapeutic benefits. Benefits include relief from anxiety, depression, arthritis, inflammation, nausea and pain. The aroma and taste of Blue Dream are lemon-citrus, with berry and Haze notes. The effect of this strain is a powerful and uplifting cerebral one, mentally stimulating but bodily relaxing at the same time.
Purple Ghost Candy
Purple Ghost Candy from Seedsman is an absolute must if you’re looking for the highest of the high THC strains. This is another high-quality strain that delivers a knockout punch like few others.
Purple Ghost Candy is an easy-to-grow cannabis strain, so much so that it’s recommended even for beginners. Make no mistake, though – this is genuinely connoisseur cannabis. It’s another mostly-sativa strain, but it packs an incredible 27% THC!
The aromas and taste of Purple Ghost Candy are every bit as sumptuous as its appearance. Fuel-like in its scent, but the flavours are decidedly fruitier – let those lemon and peachy tones dance on your palate, with earthy mint notes in support. This is an absolute taste sensation.
Purple Ghost Candy’s very high THC content makes for a potent effect. Expect physical relaxation balanced well with cerebral stimulation. The 12-week maximum flowering time of Purple Ghost Candy is longer, but it is most certainly worth waiting for this absolute champ!
Peyote WiFi CBD 2:1
In sharp contrast to the high-THC madness of Purple Ghost Candy, Seedsman proudly presents a unique cannabis strain – Peyote WiFi CBD 2:1. This is an intriguing cross-breed of Peyote Purple, WiFi OG, and Seedsman CBD#2. The result is a high CBD cannabis strain with the power to soothe and relieve for medical consumers.
Peyote WiFi CBD 2:1 is an indica/sativa hybrid with a THC percentage between 5-10%. CBD is between 12-14%, meaning the therapeutic benefits of this strain are free to enjoy without THC’s debilitating psychoactive effects.
Peyote WiFi CBD 2:1 is a hardy and resilient plant that grows well in most climates and has a flowering time of around 65 days. Its benefits include relief from pain, depression, anxiety, and loss of appetite. This unique medical cannabis grows well in all environments.
Strawberry Cheesecake Auto
One of our most in-demand strains, Strawberry Cheesecake Auto is a fast-finishing strain that will automatically begin flowering regardless of light. This strain consistently delights growers thanks to its high yields and big, dense buds.
Coming in at under 200cm, Strawberry Cheesecake is pretty compact, making it ideal for growing in confined spaces. Don’t let the size fool you, though – what it may lack in stature, it more than makes up for in flavour!
Skunky with fruity lemon notes, this strain is an absolute treat on the palate. THC content is around 15%, and its mostly indica nature means the effect is quite physically relaxing but mentally stimulating at the same time. Strawberry Cheesecake Auto is ideal for relaxing daytime use without serious impairment.
Jack Herer FAST
To include something for everyone, Seedsman presents Jack Herer FAST. What better than a legendary old-school strain that’s ready in just seven weeks if you need weed in a hurry?
This speed demon of a plant combines the classic Jack Herer cannabis strain with FAST genetics, reducing the waiting time and bringing top-notch buds to you quicker than ever. Jack Herer FAST is another easy-to-grow strain suitable for beginners and will yield a respectable 400 gm/m2 of high THC (20%) resinous buds.
Jack Herer FAST is a squat plant and will have a limited stretch to just over 100cm. It maintains the sweet peppery taste of the original and is every bit as potent as you’d hope.
Cultivation information, and media is given for those of our clients who live in countries where cannabis cultivation is decriminalised or legal, or to those that operate within a licensed model. We encourage all readers to be aware of their local laws and to ensure they do not break them.
How to Make Feminized Seeds Easily at Home
If you’re not a total beginner as a grower, you probably know that male cannabis plants pollinate female plants. You may also know that only female plants produce the flowers that cannabis fans know and love.
The problem with male plants is that if they pollinate your girls:
- The girls will produce seeds
- Their buds will have less resin & THC
- Your total bud yield will be lower
Growers normally buy feminized seeds from breeders and seed banks because they can count on almost all of those seeds becoming female plants with high THC and all the other goodies cannabis has to offer.
Here you will learn to feminize seeds yourself.
What is a Feminized Seed?
A feminized cannabis seed is what you get when you breed two female plants instead of a male and a female. When you plant feminized seeds, they germinate and grow into females.
The way to feminize seeds is to force females to produce pollen sacs. You can use that pollen to fertilize other females.
How do you trick them into producing male buds? Induce environmental stress or change their hormones chemically.
Choice #1 – which is called Rhodelization – is not a favorite method of breeders. It’s more complicated than changing hormones.
The trick to rhodelization is to fool the girls into “thinking” that they’re dying. A female anticipating death wants to optimize the continuation of the species. When they think they’re doomed, they will produce female seeds almost exclusively. This is because a small number of male plants can fertilize an entire room full of girls, so very few of them are needed. Cannabis pollen outdoors travels far and wide. The girls are more essential.
How to Make Feminized Cannabis Seeds by Changing the Hormone Balance Chemically
This is the most common method top breeders use to feminize seeds.
To do this, you can use one of four substances:
- Colloidal silver (CS)
- Silver thiosulfate (ST)
- gibberellic acid (GA3)
You can find colloidal silver at bricks and mortar natural foods stores or through online supplement stores. If you want to make your own, there are plenty of guides online that show you how to do that.
Step 1: Grow 1 or More Female Plants
Let these ladies grow through the vegetative stage.
Step 2: Spray the Bud Sites Daily
When the buds start forming, put colloidal silver in a spray bottle and drench the bud sites once per day. The buds will develop into male-like buds that have the power to pollinate. The process will take three or four weeks. Don’t stop spraying them until the pollen-filled buds start opening and the leaf that protects the pollen begins to crack.
Warning: If any female buds form, don’t smoke them. They could be dangerous because of the chemicals.
Step 3: Harvest & Dry the Pollen Sacs
Pluck the pollen sacks. Place them somewhere that allows them to dry. The drying process should take about a week.
Step 4: Put Your Sacs in a Bag & Shake ‘em Up
You can use a can for this, too. The sacs will release pollen when you shake them. Keep your container closed while doing this so that no pollen escapes.
Store your pollen in a ziplock bag or something air tight.
Step 5: Fertilize Some Lady Plants
The best time to pollinate your plants is when they are about two or three weeks into the flowering stage. If you wait too long, they’ll produce less seeds.
Do this step in a closed room. It’s a delicate process. There are lots of tutorials online about how to pollinate cannabis. Find a good one and follow the steps.
Step 6: Harvest Your Feminized Seeds
You can tell the seeds are ready when some of them start dropping from the buds. They should be brown and not green. You may need to give the plant some nutrients or whatever it takes to keep her alive so that she can get to the seed dropping phase.
Harvest the seeds with your fingers.
Step 7: Store Your Seeds or Plant Them
Keep your seeds in a cool and dry place. Mark them with a harvest date so you know how old they are. If you store them properly, they’ll keep for a few years. You can plant them any time after harvest.