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Do Feminized Cannabis Seeds Make Hermies?

What Are Feminized Cannabis Seeds? These seeds all grow up to be female plants. That means every plant produces buds. With “regular” or unfeminized seeds, about half the plants will turn out to be male, which don’t produce buds. They can also pollinate your female plants (causing seedy buds). Therefore most growers will remove male plants from the grow room as soon as they’re identified. Learn more about male vs female plants. Feminized seeds let you plan your grow more effectively because you don’t have to throw half the plants away once they start flowering.

Every plant grown from feminized seeds will produce the buds we know and love. This plant was grown from feminized Swiss Cheese seeds.

What Are Hermies? “Hermie” is short for “hermaphrodite.” Hermie cannabis plants usually look like normal female plants for the most part, but they also grow some male parts that produce pollen. This causes seedy buds just like pollen from male plants. Hermies are to be avoided! Read the full tutorial on hermies.

It’s no good if your “female” plants start growing male flowers or parts of male flowers. That can cause seedy buds just like a male plant!

This bud got completely seeded due to a hermie in the grow space. Notice the lumpy round bits. Those are seeds forming.

What’s the matter with a few seeds?

Cannabis growers are trying to grow sinsemilla (seedless buds). A few seeds won’t hurt anything. But if you have very seedy buds, it significantly lowers your yields because plants are putting all their energy into making seeds. The buds also tend to be less potent if they are full of seeds. Seeds are not the end of the world, but it’s good to avoid if possible.

“Sinsemilla” means “no seeds.” Sinsemilla is the highest quality and most potent of all buds

Since most growers are trying to grow sinsemilla, having only 100% female plants in the flowering grow room is crucial to prevent pollination.

Feminized cannabis seeds can be a blessing for small-scale growers. While male plants produce pollen sacs, feminized seeds ensure all your plants will end up being bud-bearing females (instead of growing half male and half female plants like with regular seeds).

If you don’t have room for extra plants, feminized seeds can make planning your grow a lot easier!

Good feminized seeds should produce only 100% female plants, with no hermies or male plants. So starting with feminized cannabis seeds lets you make the most efficient use of your grow space. You don’t have to worry about identifying male plants and throwing them away before they pollinate your female plants. With good feminized seeds, you know that if you’re growing 10 plants, all 10 of them will make buds, and that makes it easier to plan out your grow ahead of time.

With all these bonuses, why would any small-scale grower use any other type of seeds?

Pros of Feminized Cannabis Seeds

All plants produce buds

You don’t have to throw away half your plants after nurturing them for weeks

You don’t have to worry about your buds getting pollinated, causing seedy buds, reduced bud quality and lower yields

But is there a dark side to feminized cannabis seeds?

One of the biggest worries growers have about feminized seeds is that they will produce hermies instead of 100% female plants as advertised.

This hermie is growing both male and female flowers. Can this be caused by feminized seeds?

Unfortunately, hermies can be a lot easier to miss than a male plant since it may just be a small part of the plant that’s affected. A male plant makes itself known at the beginning of the flowering stage, but a hermie plant may grow only buds except for just one or two tiny pollen sacs. A few yellow hermie bananas hidden in the buds can also produce pollen. Any type of male flower part that grows in your garden can add seeds to your buds, and hermies are some of the worst offenders.

This grower didn’t notice that the buds had been seeded until harvest. As he was trimming, he noticed seeds popping out. Since there were no male plants, chances are this was caused by an unnoticed hermie somewhere in the grow space.

Is it True that Feminized Seeds Sometimes Cause Hermies? Yes!

Many growers believe that feminized seeds can cause hermies, and there is some truth to that. In order to create a feminized seed, one of the parent female plants had to be forced in some way to produce pollen.

That pollen is used to pollinate another female plant, and the offspring of those two plants will all be female since both of the parents were female. That’s how you get feminized cannabis seeds. But that also means every time you have a feminized seed, that seed had a plant that produced male flowers in its recent genetic history.

There are different ways to feminize seeds, but only some methods produce seeds that turn hermie on you.

It’s important to understand that hermies can happen a couple of different ways. And the different types of hermies affect what genes are being passed on to the seeds.

This swollen calyx has a seed developing inside

What Causes Hermies?

Hermies can be caused by many things, including…

bad genetics – the plant comes from a line of plants that naturally create hermies for no reason, even in good growing conditions

high stress – high temperatures, light leaks, inconsistent light schedules, as well as other types of major stress can cause a healthy plant to hermie, though some plants/strains are more susceptible than others

letting buds over-mature – this is also known as “rodelization;” basically when the plant’s buds have gone past maturity without being pollinated (if the grower waits way too long to harvest), a female plant may make male pollen within its buds as a last ditch effort to pollinate itself and make seeds for the next generation

chemical stimulation – by exposing a female plant to certain substances like colloidal silver or gibberellic acid during the early parts of the flowering stage, you can force any female plant to create pollen. This is how seedbanks get female pollen to produce feminized seeds.

Seeds created from “female” pollen will turn out being female (or at least as female as the parents).

The pollen from a hermie plant makes feminized seeds

The pollen sacs on this masculinized female plant have opened and pollen has spilled onto the leaf below

Another type of hermie: a yellow “banana” can appear in your buds and make pollen. This male flower part would normally be inside a pollen sac. When it’s in the open like this, it becomes a little pollen generator.

Feminized seeds are susceptible to becoming hermies themselves when exposed to the same conditions as their female “father” who produced the pollen. But since any plant can be chemically induced to produce pollen, it doesn’t mean that the ability to hermie in a natural environment is passed on to the seeds.

So only some feminized seeds come from parents with bad genetics, and that’s what’s the grower cares about most.

The bagseed gamble… When you find seeds in your buds, that usually means that the buds were pollinated by accident. Seeds that were accidentally created are suspect. It could be that a stray male plant caused them, which means there were no hermies and you will get about half male and half female plants. But accidental seeds could also be the result of herming by an indiscriminate grower, and that means you have feminized seeds, sort of. Some of them may produce pollen on you just like their parents. Growing with bagseed is a big gamble… you never know what you’re going to get.

Are your cannabis bagseeds viable? Viable, good seeds usually appear either dark and striped or solid gray/beige.

If a seed is pure white it usually means it’s underdeveloped and won’t sprout. But it can sometimes be hard to tell. In the end, if a seed sprouts and grows it’s a viable seed! I’ve had very pale, flimsy seeds sprout into gorgeous fast-growing plants, so if you’re not sure the best thing to do is try to germinate it!

Seed Banks & Breeders

Commercial breeders and seed banks use chemical stimulation to create feminized seeds. What that means is they put specific compounds on developing female plants to force them to produce pollen. You can actually do this yourself at home.

This technique works on nearly any female plant, including plants that would never hermie naturally. So it can be used to take two plants with great genetics to produce female seeds. But the same process will also work incredibly well on plants that do hermie easily all on their own. That means it’s up to the breeder to test and make sure that they have a solid plant with unbeatable genetics before using the feminization technique.

The pollen that results from chemical stimulation is used to pollinate another female plant and make feminized seeds. If the parent plants would never hermie without chemical stimulation, then you have created feminized seeds that won’t ever make pollen in your grow room.

But if one of the parent plants was chosen because it does hermie easily, you’ll end up with seeds that likely will herm. The breeder might not have done any testing on the parents or the resulting offspring to even know.

Without testing, a breeder can’t tell whether they’ve created quality feminized seeds

Choosing the Right Cannabis Breeder

Unfortunately, some cannabis seed breeders are more trustworthy than others. The great ones have created stabilized strains that have been bred over several generations to produce a consistent product without any problems with plant sex.

Less scrupulous breeders might breed two random female plants together and sell the resulting seeds as a new strain without any testing. In this second case, you don’t know what to expect, and neither does the breeder.

If the breeder hasn’t tested their strains extensively in many situations, they won’t know whether their seeds tend to hermie or not. If they have carelessly bred plants that have a tendency to herm, then it’s really likely that at least some of the resulting seeds will have the same problem.

Breeder choice is important!

I have to admit I may be biased towards feminized seeds. I’ve grown almost exclusively with feminized seeds over the last decade. It has made my life so much easier! I only purchase seeds from breeders that I trust and all the resulting seeds have been bud-bearing females. I haven’t had any real problems with hermies.

On the flip side, I’ve heard of growers buying feminized seeds from untrustworthy breeders and having a big portion of their seeds turn male or become hermies even in perfect growing conditions. So there is truth to the fact that you can run into hermie problems with feminized seeds.

Yet there are good and bad breeders out there, and with good breeders, you have a very low chance of running into cannabis sex problems.

So if you do choose to purchase feminized seeds (or any seeds really), please make sure you get them from a trusted breeder!

Conclusion: Feminized seeds from a trustworthy breeder have a low chance of producing hermies, but the odds are much worse with feminized seeds from an untrustworthy source

The truth is it takes a hermie of some sort to create feminized seeds. That means that you always run the risk of running into hermies when growing feminized seeds… yet that is true for non-feminized cannabis seeds, too! Lots of regular seeds produce hermies.

What’s most important, whether you get feminized seeds or not, is to get your seeds from a breeder who has a reputation for producing quality genetics. That is the best thing you can do for any strain to ensure a smooth grow. With a great breeder, you have a very low risk of running into any sex or gender problems.

I personally prefer feminized seeds, and that’s the only type of seed I grow. It makes it easier for me in my limited grow space. I haven’t run into any significant problems with hermies, so I’m satisfied with growing only bud-bearing plants.

Yet a lot of growers grow with regular seeds because they’re easier to breed and produce at home. Many growers have created a system for weeding out male plants that is more convenient for them than using feminized seeds.

In the end, when it comes to feminized cannabis seeds you need to decide whether the small chance for hermies is worth the convenience of all-female plants. It’s up to you to figure out what’s best for your needs!

"Hermie" cannabis plants can look like normal female plants at first glance, but they produce pollen that causes seedy buds. Hermies are to be avoided!"

Cannabis Plants Anatomy: From Seeds To Buds

Many consumers have seen a cannabis flower and maybe leaf but have never seen a plant grow from seed.

When growing cannabis, it’s essential you become familiar with the anatomy of a cannabis plant to know what they need and prevent problems.

It’s crucial you know the parts of a cannabis plant such as roots, nodes, calyxes, and trichomes, and what they’re used for to be able to maintain a healthy garden.

1. Anatomy of female vs male plants

Cannabis plants are dioecious, this means they have separate sexes, so the plants can be male or female.

In cannabis, the female plant produces high levels of cannabinoids and develops flowers (buds) while the male plant produces low levels and develops pollen sacs.

When both of them interact, the pollen fertilizes flowers, producing seeds which are used for breeding and cannabis cultivation.

It’s essential you know which one you need to grow to achieve the desired results, so in this article, we’ll explain the main differences and the anatomy of a cannabis plant.

2. Seeds and seedlings

A seed is the first thing you need to start growing your own cannabis, a cannabis seed has a hard shell to protect the embryo, this embryo is what will develop into a seedling when germinated.

When exposed to the right temperature and moisture, you will see a seedling (baby plant) start to develop, this seedling comes out of the medium with a small pair of green rounded leaves named cotyledons.

The cotyledons already contain chlorophyll which allows the tiny leaves to perform photosynthesis but it’s only in the early vegetative stage that you will see the first pair of serrated leaves develop and this is when the plant will start to absorb energy and nutrients, and direct it to the growth of foliage and stems.

3. Roots

After 3-5 days of exposing the seed to germination conditions, you will see a white “tail” coming out of the seed, this “tail” will start to grow longer and thicker as soon as the seed is planted and will eventually become your plant’s taproot, which is the main root from where rootlets sprout.

Once the taproot grows to a considerable size, several lateral roots will start to emerge from it, forming a network of roots in the soil, this root network is responsible for absorbing water and nutrients which are vital for your plant’s growth.

4. Fan leaves

After the cotyledons have appeared, they will be exposed to sunlight. This is important because the cotyledons use photosynthesis to absorb sunlight and produce energy for the plant to grow. After a couple of days, the first serrated leaves will appear, and as the plant grows, bigger foliage will appear and each time they will have more apexes, which are the fingers of a cannabis fan leaf.

Depending on the genetics, the foliage can have five, seven, nine, or more fingers but either way, independent of the number of apexes, the fan leaves use sun, water, and C02 to produce sugars.

Also, the leaves are different depending on the genetics, for example, Indica leaves are usually wider with more fingers while Sativa leaves are thinners and have more fingers, there are also autoflowers that start with leaves similar to Ruderalis leaves and it can get complicated to differentiate so here’s a table to help you figure it out easier.

Cannabis leaf characteristics

Species Leaf characteristics
Sativa Skinnier with up to 13 “fingers”.
Indica Fat and wide leaves with up to 9 “fingers”.
Ruderalis Short and compact, developing 3-5 “fingers.

These sugars are a cannabis plant’s source of energy and it fuels growth and all the biological processes it needs.

Have in mind that even though the foliage is a part of a cannabis plant, they have low levels of cannabinoids so their purpose is to absorb sunlight, store water, and also protect the buds from sunburn but are not usually smoked.

5. Sugar leaves

Sugar leaves are regular leaves but unlike fan leaves, they’re not too big and usually grow in between the buds. This foliage can sometimes have trichomes on them but will depend on the trichome production of each specific strain.

These leaves contain less resin that buds and are usually not consumed but depending on the quality of the genetics, these leaves can be used to make edibles, oils, and extracts.

6. Pre-sex structures

The pre-sex structures appear on the internodes in the pre-flowering stage of the cannabis plant, if your plant turns out to be a male, you’ll see small balls appearing which are pollen sacs in the early stages.

These pollen sacs will eventually develop and open up, releasing the pollen needed to produce seeds, now, if you see white hairs (stigmas) instead of pollen sacs, your plant is definitely a female.

If you’re a home grower, you should “sex” your plants before they are completely mature, this will prevent the male plants from pollinating the female plants, have in mind that fertilized flowers will produce seeds which decreases the amount of cannabinoids and overall yield.

Now, if you’re a breeder or just want to experiment with cannabis breeding, you can have a breeding chamber so you can pollinate your plants in a controlled space and prevent cross-pollination because pollen is extremely light and can travel on your hair, clothes, and even by the wind.

7. Branches and stems

As said above, leaves absorb sunlight, and as new leaf growth appears, your plant will consequently get more light and the stem and branches will get thicker and thicker, developing more internodes (and more internodal spacing) on both sides of the stem.

The main part of a cannabis plant’s anatomy is the stem, the stem provides support to the foliage, branches, and flowers (basically the whole plant), inside the stem, there is a vascular system that consists of the Xylem and Phloem.

The Xylem transports water and the nutrients dissolved in water while the Phloem is responsible for transporting sugars, proteins, and other organic molecules in plants.

Sometimes plants can develop mutations, these mutations are genetic mutations so they cannot be fixed, and although some mutations can result in odd growth such as irregular branching and leaf growth, they can still produce good quality flowers, despite sometimes the yields being affected.

8. Nodes

Nodes are the point where branches come off from the stem, in the vegetative stage of a cannabis plant they’re parallel to each other but when your plant begins flowering the appearance of nodes can become irregular, now this isn’t a problem at all, it’s just a characteristic of some cannabis strain and is usually a trait that can help you identify a certain plant’s species.

Have in mind that nowadays most cannabis strains are hybrids (a combination of Indica and Sativa genetics) so this won’t always be 100% correct but usually, Indicas tend to have nodes that are closer together while Sativa’s nodes are usually more spaced out.

These nodes are essential because they are where the buds or pollen sacs will start to develop and it’s where the first signs of your plant’s sex appear.

9. Flowers (buds)

The buds (flowers) are the most important part for growers but also for the cannabis plant, the flowers play several roles such as attracting pollinators and producing seed (once they’re fertilized) to perpetuate the species.

Nowadays you can find feminized seeds which means the seeds will result in 100% female plants but in nature, cannabis plants are dioecious which means the plants will be male or female, as said before.

The pre-flowering stage is vital in differentiating whether the plant is a male or a female because it’s when a plant will show the first signs of its sex.

The flowers that form on the top of the stem are known as the cola, typically, a plant has one main cola but growers have come up with several methods of creating multiple main colas with plant training techniques (such as LST and HST) that help increase yields.

The main cola is known as the apical bud or main cola and it’s where most of the buds gather together to form the main bud, you’ll also see small clusters of flowers between the foliage in the internodes but, compared to the main cola, the side colas are smaller so this is why growers use both LST and HST.

These two plant training methods end up changing the structure of the plant by exposing the flowering sites to more light and airflow, allowing the buds to grow bigger while also improving their quality.

When talking about flowers, there’s a distinction between female and male flowers. Male plants usually develop 2-3 weeks earlier than female flowers and, as said above, do not develop buds but they also form colas that consist of pollen sac clusters.

10. Pistils and stigmas

The pistils and stigmas are the reproductive parts of the female flowers, most cannabis consumers know the stigmas as pistils but that is wrong because the pistils are the part where the stigmas (white hairs) grow from.

These hair-like parts are responsible for collecting pollen grains from the male flowers and consequently, produce seeds.

When a cannabis plant is fully mature, the stigmas can change color several times, usually starting with white hues, then yellow, orange, or red, and lastly, brown.

Now, have in mind that the stigmas do not affect the potency or taste because they do not store any cannabinoids and don’t have trichomes so they won’t influence the quality and effect of your buds.

11. Calyxes

The calyxes are what actually form the buds on a cannabis plant, they are pear-shaped nodules that develop between the sugar leaves but depending on the strain, they can appear in several colors, shapes, and sizes.

When the stigmas get pollinated, the calyxes essentially turn into an ovary (seed incubator) which allows the seeds to grow and ripen but ends up affecting the yields and can affect the resin quantity on your buds, that’s why “sinsemilla” or feminized seeds are preferred by growers and consumers.

A non-pollinated flower is usually trichome-rich because your harvest will have more trichomes which are responsible for producing and storing terpenes and cannabinoids.

12. Trichomes

Trichomes are the tiny crystals found all over the buds and surrounding foliage and is considered the most important part for cannabis consumers, these mushroom-shaped glands are clear and sticky, and form a thick layer on the buds.

Theses mushroom-shaped glands known as trichomes can be found in three different forms:

  • Bulbous trichomes
  • Capitate sessile trichomes
  • Capitate-stalked trichomes

All “recreational strains” are THC-rich, depending on the strain, the trichome production may differ, resulting in more or less trichomes on your plants, but either way, your cannabis plant will produce trichomes.

For home growers, the trichomes are the standard practice to know exactly when to harvest but in nature, the compounds produce by the cannabis plant provide defense mechanisms, such as terpenes, which smell helps keep away predators.

Also, the sticky trichomes protect the buds from insects and against UV light, and although we don’t usually think about this when growing indoors, all the parts of a cannabis plant have an important role when cannabis plants grow in nature.

13. In conclusion

Cannabis plants are millennial plants that have developed and perfected their structure throughout the years, even though we don’t see it like that, all the parts of a cannabis plant are essential for them to grow and perpetuate their species.

Feel free to leave tips and more important information to help educate fellow growers, leave a comment in the comment section below!

External References:

  1. Morpho-Anatomy of Marijuana (Cannabis sativa L.). – Raman, Vijayasankar & Lata, Hemant & Chandra, Suman & Khan, Ikhlas & Elsohly, Mahmoud. (2017).
  2. Understanding Cannabis. – Hunt, Debra & Keefe, Joanne & Whitehead, Tammy & Littlefield, Amber. (2020).

Everything you need to know about the anatomy of cannabis plants.