When it comes to cannabis, female plants produce flowers (or buds) and males produce pollen. Unless you plan on breeding, male cannabis plants… Knowing the anatomy of a marijuana plant is important for any grower. Learn to identify the different parts of a cannabis plant from the experts at Leafly. Find out the difference between male and female weed plants; now you can grow regular seeds and easily find the male plants in your crop to maximize yield.
What do I do with a Male Cannabis Plant?
When it comes to cannabis, female plants produce flowers (or buds) and males produce pollen. Unless you plan on breeding, male cannabis plants will release pollen into the growing area and produce unwanted seeds in nearby female flowers. Cannabis flowers with seeds are usually lower in potency and less desirable. Male plants in a flowering room should removed as soon as they are identified.
You will only get a male cannabis plant is you grow from a non-feminized seed. In today’s world, if you get a clone from a trusted friend or local shop, they will always grow to be a female plant. Male and female plants can be easily identified in early flowering by looking for the following characteristics below:
Male cannabis plants have stamens and female plants have calyxes. To the untrained eye, an early calyx and stamen can look quite similar. As the cannabis plant begins to mature, multiple stamens will begin to appear on the males and the females will have pistols emerge from their calyxes. Over time the stamens will fill with pollen and eventually open, releasing it into the growing environment. Once a plant shows clear male characteristics, it should be removed from the flowering area and potentially used for future breeding projects.
Marijuana plant anatomy and life cycles
The cannabis plant has several structures, many of which we can find on any ordinary flowering plant species. Cannabis grows on long skinny stems with its large, iconic fan leaves extending out from areas called nodes.
Cannabis really stands out in its flowers—or buds—where unique and intricate formations occur: fiery orange hairs, sugary crystals, and chunky buds enveloped by tiny leaves.
The life cycle of a marijuana plant
There are 4 stages in the life cycle of a marijuana plant:
- Germination (3-10 days): When the seed sprouts and pops out of the soil
- Seedling (2-3 weeks): After germination, when the plant develops its first cotyledon leaves
- Vegetative (3-16 weeks): The immature or juvenile stage, when a cannabis plant grows its stalks, branches, stems, and fan leaves
- Flowering (8-11 weeks): When a weed plant starts producing buds
Parts of the cannabis plant
Seeds are produced in female cannabis plants and carry the genetics of a male and female. Seeds need to germinate to sprout and will grow a taproot, which will become the main root that anchors the plant.
These are the first leaves to grow from the seed after germination. They usually come in pairs, and seeing them is a sign of successful germination and that your plant is on its way to growing healthy and strong.
The roots grow down from the main stalk of the plant into the soil. When growing from a seed, the main root is called the “taproot.” Roots are the lifelines of a cannabis plant, pulling water and oxygen into the plant so it can grow healthy and strong.
Mycorrhizae, a beneficial fungus, can be added to soil to improve root systems.
Marijuana plant stem
The main stem, or stalk, of a cannabis plant grows straight up from the root system and supports all lateral branches. The stem gives a plant structure and stability.
Often, growers will top, or cut off, the stem after about five nodes, which forces the plant to grow out laterally more, creating more bud sites.
Branches grow out of the main stem and support fan leaves and buds. Growers often train a cannabis plant by topping branches to create more bud sites.
A node is a point at which a branch grows off of the main stem, or one branch from another branch. Fan leaves and buds can grow on some nodes, but not necessarily all.
When determining the sex of a cannabis plant, pre-flowers, or the beginnings of male and female sex organs, will appear at the nodes.
The space between nodes is called “internodal spacing” and will give you a sense of whether a plant will grow tall or short.
Check out Johanna’s full video series on how to grow weed on Leafly’s YouTube .
Fan leaves are the large, iconic leaves of the cannabis plant. They capture light for the plant and typically have little-to-no resin and are usually discarded when trimming.
Sugar leaves are the small, resin-coated leaves that buds form around. Sugar leaves are usually saved as “trim” during harvest and can be used for pre-rolls, extracts, and other cannabis products.
Also known as “buds,” the flowers of a cannabis plant are the fruits of your labor. They contain the cannabinoids and terpenes that get you high or offer health benefits. Flowers only grow on female cannabis plants and must be dried before consumption.
A cola, also called a “bud site,” refers to a cluster of buds that grow tightly together. While smaller colas occur along the budding sites of lower branches, the main cola—sometimes called the apical bud—forms at the top of the plant.
Bract and calyx
A bract is what encapsulates the female’s reproductive parts. They appear as green tear-shaped “leaves,” and are heavily covered in resin glands which produce the highest concentration of cannabinoids of all plant parts.
Enclosed by these bracts and imperceptible to the naked eye, the calyx refers to a translucent layer over the ovule at a flower’s base.
Stigma and pistil
The pistil contains the reproductive parts of a flower, and the vibrant, hair-like strands of the pistil are called stigmas. Stigmas serve to collect pollen from males.
The stigmas of the pistil begin with a white coloration and progressively darken to yellow, orange, red, or brown over the course of the plant’s maturation. They play an important role in reproduction, but stigmas bring very little to the flower’s potency and taste.
Despite their minute size, it’s hard to miss the blanket of crystal resin on a cannabis bud. This resin is secreted through translucent, mushroom-shaped glands on the leaves, stems, and calyxes.
Plants originally developed trichomes to protect against predators and the elements. These clear bulbous globes ooze aromatic oils called terpenes as well as therapeutic cannabinoids like THC and CBD. The basis of hash production depends on these trichomes and their potent sugar-like resin.
Male vs. female marijuana plants
Cannabis is a dioecious plant, meaning it can be male or female, and the male and female reproductive organs appear on different plants. What’s in your stash jar now are the flowers of a female marijuana plant.
Female plants produce the resin-secreting flower that is trimmed down into the buds you smoke, and males produce pollen sacs near the base of the leaves. Male plants pollinate females to initiate seed production, but the buds we consume come from seedless female plants—these are called “sinsemilla,” meaning “seedless.”
Growers can ensure the sex of their plants by growing clones or the genetically identical clippings from a parent strain. Feminized seeds are also made available through a special breeding process.
How to determine the sex of a marijuana plant
Cannabis plants show their sex by what grows in between their nodes, where leaves and branches extend from the stalk. Pollen sacs will develop on a male plant to spread seeds and stigma will develop on a female to catch pollen. You can see these differences weeks before they actually start serving their purposes in the reproduction cycle. These are known as “pre-flowers.”
Pre-flowers begin to develop four weeks into growth, but they may take a little longer depending on how quickly the sprouting phase occurs. By the sixth week, you should be able to find the pre-flowers and confidently determine the sex of your plant.
Examine the nodes of the plant and look for either the early growth of small sacs on a male, or two bracts on a female, which will eventually produce the hair-like stigma.
Female marijuana plants
Females are the prizes of cannabis plants—they are the ones that grow the buds that we all know and love. Anytime you see a picture of a cannabis plant with buds, you are looking at a female plant.
Female cannabis plants receive pollen from males to produce seeds, which will carry on the genetics of both plants to the next generation.
However, cannabis is primarily cultivated for buds, not seeds, so the practice of growing sinsemilla, or “seedless” cannabis, is prevalent today: Females and males are grown separately, or males are even discarded, to prevent pollination. This allows female plants to focus their energies on bud production instead of seed production.
Males and females are usually only pollinated when crossbreeding plants or creating new strains.
Early signs of a female cannabis plant
A few weeks into the flowering stage, sex organs will appear on a cannabis plant at a node, between the main stem and a branch. The female reproductive organs look like an oval with white hairs coming out of them, which are pistils.
If you’re not quite sure, let the plant grow for another week or so and check again.
Male marijuana plants
Male cannabis plants grow pollen sacs instead of buds. Male plants are usually discarded because you don’t want them to pollinate the females, which will produce seeds—no one wants to smoke buds with seeds in it.
Males are important in the breeding process, but that is generally best left to expert breeders. When pollinating females, males provide half of the genetic makeup inherited by seeds.
Because of this, it’s important to look into the genetics of the male plants. Their shape, rate of growth, pest and mold resistance, and climate resilience can all be passed on to increase the quality of future generations.
Early signs of a male cannabis plant
To spot a male weed plant, check the sex organs at a node, between the main stem and a branch. The male organs will look like a round ball—these will develop into pollen sacs.
If you’re not sure if it’s a male or female yet, wait a week or so and check again. At this early stage there isn’t much risk of a male pollenating your crop.
What can I do with male cannabis plants?
Male plants can also be used for:
- Hemp fiber—males produce a softer material, while females produce a coarser, stronger fiber. The soft fiber from males is more desirable for products like clothing, tablecloths, and other household items.
- Concentrate production—males do have some THC and can be psychoactive, but much less so than females. Small amounts of cannabinoids can be found in the leaves, stems, and sacs, which can be extracted to produce hash and other oils.
What are hermaphrodite cannabis plants?
The rare hermaphroditic plant contains both female and male sex organs. These plants can sometimes self-pollinate, but this is typically bad as it will create buds with seeds and also pass on hermaphroditic genes.
“Herming out,” as some call it, is something that generally happens when a plant becomes excessively stressed. Some stressors include:
- Plant damage
- Bad weather
There are two types of hermaphrodite cannabis plants:
- A plant that develops both buds and pollen sacs
- A plant that produces anthers, commonly referred to as “bananas” due to their appearance
While both result in pollen production, true hermaphrodite cannabis plants produce sacs that need to rupture; anthers are exposed, pollen-producing stamen.
Because this occurs when cannabis is under stress, it’s important to monitor plants after they have been exposed to stressors: indoors, high temperatures or light leaks are often the cause; outdoors, a snapped branch might be repaired and then turn into a hermaphrodite.
The other primary cause of hermaphrodite plants lies in its genetics—a plant with poor genetics or a history of hermaphroditic development should be avoided to protect your garden. If you notice any pollen sacs or anthers at any point, remove the plant from your garden immediately to prevent pollination of female plants.
Marijuana plant anatomy FAQ
What are the first leaves called on a cannabis plant?
Flowering plants, including cannabis, have baby cotyledon leaves which appear shortly after the seed germinates, or sprouts. These embryonic leaves help the plant get started.
How soon can you tell if a cannabis plant is male or female?
Sex organs will appear on a plant within 2-3 weeks of flowering.
When do male cannabis plants pollinate female plants?
Male pollen sacs usually open up and spread pollen via the air 4-6 weeks after they begin flowering.
How does weed grow buds?
When cannabis plants experience a reduction in light, either after the summer solstice when growing outdoors, or manually when growing indoors, they will begin the flowering stage, when buds are produced. Flowering typically takes 7-11 weeks, depending on the strain.
The Difference Between Male and Female Weed Plants
Cannabis plants have evolved enormously over the past couple of decades, mainly thanks to human kind. We’ve spent years combining different species from all over the planet. Every strain has its own specific characteristics, such as structure, type of buds, flavor and effects. When you combine male and female weed plants that are different strains, the new creation takes on characteristics from both, allowing us to create totally new plants.
One of the biggest achievements has been the appearance of feminized plants; after years and years of work, cannabis seeds can be created to have a 99% chance to be female. You need to know how to tell male from female plants when growing regular seeds, as you’ll only get actual psychoactive weed from the female flowers. Male plants pollinate female plants, which fills their flowers up with seeds so if you’re looking to make the most of your plants you’ll want to keep them away from each other. Hopefully we can help you to tell the difference between male and female weed plants by the end of this article; it’s not that hard, but if it’s not explained correctly it can be a bit confusing.
What’s the difference between male and female weed plants?
Male plants essentially produce pollen which is needed for cannabis plants to naturally reproduce; seeds occur when there are male plants in the mix. If you want to make your own seeds you will need a male plant However, if you’re growing regular plants and want to harvest flowers, we recommend getting rid of any males as soon as possible. You won’t be able to tell them apart until they begin to flower, which is when plants begin to show their sex. Male weed plants grow “balls” that open up to let their pollen out, ending up looking like a small bunch of flowers. You’ll need to get rid of them way before this happens. If they manage to release their pollen it’ll be too late. They can take up to three weeks to burst. If you’re still not sure how to tell them apart, male flowers do not have any pistils on them at all.
Female plants are basically what everyone is after when growing cannabis, as these are the ones that make buds, which is the part of the plant that contains the most THC. With just one male plant and a minuscule amount of pollen, your plants might end up filling their flowers with seeds. If you have male and female plants in the same growing area, the buds grown there will only produce seeds so you won’t be able to smoke any of it. You can tell females apart due to the fact that their flowers don’t fully close, they’re actually quite open and they produce little hairs called pistils. They’re incredibly easy to recognize, as the first thing they produce are their pistils, which male plants do not have at all.
Hermaphrodites are a type of plant that contains both male and female flowers, so they will produce buds but they will also pollinate those buds and the rest of your plants. Plants may naturally become hermaphrodites or be turned into one due to stress. Both female and male plants can turn. Thai strains are more genetically inclined to become hermaphrodites, although any strain can turn when stressed enough. There are many factors that can stress out your plants and end up turning them, such as extra light when they’re supposed to be in the night cycle, too much or not enough water, certain insects or pathogens, watering with cold water, or even a badly done transplant. Hermaphrodites aren’t the best type of plants to keep around, as they can produce buds but it’s definitely a risk because they might pollinate the rest of your plants. We recommend getting rid of them; it’s not worth it just for a little bit more weed.
It may seem confusing, but it really isn’t hard to tell male and female weed plants apart; they are quite different. Planting regular seeds has its benefits, as well as feminized has its inconveniences; you can get much larger yields with feminized plants as you’re guaranteed no male plants. Although, keep in mind that feminized seeds haven’t been through a 100% natural process to become female, which may affect the quality of your weed. This is why many cannabis connoisseurs haven’t made the leap from regular to feminized yet; they prefer to harvest slightly less yield that’s more potent and delicious.
However, feminized strains are a great option for rookie growers. Some seed banks, such as Nirvana seeds, Seedsman, Barney’s Farm, Ministry of Cannabis, Exotic Seeds or GB Strains offer amazing and affordable seeds that will provide fantastic results. If you are on a budget, check out our Cheap Seeds section. CBD Seeds are a great alternative for users interested on cannabis therapeutic uses.
Hemp Seeds, on the other hand, are perfect to produce sustainable fibers and make CBD products.