Last Updated: 29th October 2026
Learning to tell the difference between male and female cannabis plants is a must for growers. If you don’t know the difference, the results could be a huge setback for your operation. For that reason, you must be able to spot the differences early on. Identifying plants is one thing, but the difference between male and female cannabis seeds is altogether different.
The cannabis plant is naturally dioecious, meaning female characteristics appear on some plants, whereas male traits appear on others. In some cases, cannabis plants can grow to be hermaphrodites, meaning male and female characteristics can appear on a single plant, but for the most part, cannabis seeds produce either male or female. The good news is you can choose which seeds to buy, taking the element of doubt out of the equation.
Male vs Female: Does it Matter?
The gender of your cannabis plants certainly matters depending on the purpose of your grow. If you’re looking produce cannabis for consumption, your plants must be female. Female cannabis plants flower to produce resinous buds. Those buds contain the highly-desired trichomes that contain cannabinoids.
Male cannabis plants do not produce the buds utilised in cannabis consumption. They still produce an element of THC, but this is extremely low, so from an effect standpoint the female of the species is more deadly than the male. But there are some top uses for male cannabis plants - such as breeding new strains.
Rather than produce buds, male cannabis plants produce pollen sacs - and it’s those pollen sacs that are useful to breeders. These help with fertilizing female plants for creating new hybrid strains. If you find a male plant among your lot, move it away from the females, but consider holding on to it and experimenting with breeding your own cannabis strain.
What is a Male Cannabis Plant?
A male cannabis plant differs from a female in several key ways. Rather than developing the resinous flowers typically sought after by growers, male plants produce small flowers containing pollen sacs. These release pollen that can fertilize female plants, allowing them to produce seeds.
Physical characteristics that can help distinguish male cannabis plants include:
- Thicker main stalk and branches
- Fewer Leaves in some cases
- Pollen Sacs rather than resinous female flowers
- Generally lower concentrations of Cannabinoids (like THC, and CBD, which you can’t necessarily see but can measure), less resin production.
Male plants have an important role in cannabis breeding. Breeders use pollen from selected males to fertilize female plants, producing seed that can be used to develop new varieties or preserve genetic traits.
However, growers cultivating cannabis primarily for its flowers generally want to prevent unwanted pollination. Once a male plant releases pollen, it can fertilize nearby female plants. Pollinated femles typically redirect their more of their resources toward seed development, which can reduce the production of the seedless, resinoous flowers known as sinsemilla.
For this reason, growers who aren't breeding cannabis should learn to recognize the early signs of male plants and remove them from the growing area before they release pollen.
The Difference Between Male and Female Plants
The trouble with determining the gender of your plants lies in the time it takes before gender traits become visible. Male and female marijuana plants look identical during the seedling and vegetative stages, and gender characteristics don’t reveal themselves until the end of the vegetative stage in what's referred to as the pre-flowering stage. By that time, you’re already weeks into your operation, and discovering male traits can be a real setback at that point.
When Can You Tell If A Plant Is Male or Female?
Unfortunately, cannabis plants look identical through their life cycle's seedling and vegetative stages. Admittedly, that’s not entirely ideal for sexing your plants truly early, and so you’ll have know when to become vigilant and carry out your checks.
The good news? Male marijuana plants tip their hand sooner than females, around a week or two sooner. Your cannabis plants will enter the pre-flowering stage toward the end of the vegetative stage. It’s at this point the males will rock up and make their presence known. In the first two to six weeks of flowering, cannabis plants typically express their gender, so this is the time to get the magnifying glass out and begin sleuthing.
Determining the Sex of Your Cannabis Plant
Although it takes weeks for the gender to reveal itself, learning how to sex your cannabis plants is relatively easy. All you need is your eyes. At the end of the vegetative stage, your plants will enter the pre-flowering stage, and it’s at this point in the plant’s lifecycle, that you can begin to identify the sex of the plant. The good news is that males tip their hand a little earlier than females, giving you enough time to remove any males before your precious females begin flowering. By doing this, you avoid the risk of pollinating the females and turning them into seed producers rather than bud producers.
Sexing your cannabis plants involves keeping a close watch on them as the vegetative phase draws to a close and looking closely for signs of male sex organs. Look at the plant nodes (where a branch forms off the main stem or another branch forms off another branch). Male pre-flowers will show tiny green balls at the nodes; over time, these will grow and cluster. You'll see what looks like tiny banana-shaped appendages forming. If you don’t plan on breeding, move them away from the other plants quickly, as, within 2-3 weeks, they’ll release their contents and begin fertilizing your females.
Knowing the signs is key, but knowing where to look for those early signs of male cannabis plants is equally as important. Cannabis plants reveal their gender on the same part of the plant, regardless of whether they’re male or female. As early as three to four weeks after germination, males can reveal themselves. As the vegetative stage draws to a close, you should be checking the nodes of each plant (the stage where branch and main stem intersect) as it’s here where the plant’s sex organs will show.
A male plant will often display:
- Pollen sacs
- Thicker leaves and branches
- Noticeably fewer leaves than a female plant
Sexing Female plants involves the same visual inspection, but you're looking for the appearance of fine, wispy white hairs as the indication of female characteristics. These appear on the tiny thin protrusions called pistils and are a telltale sign of a female flower. During flowering, the calyx is the first part of the flower to develop, and it's on these calyxes you’ll see the white hairs.
The Difference Between Male and Female Cannabis Seeds
It’s pretty easy to tell the difference between male and female cannabis plants, but what about cannabis seeds? Can you tell female seeds from male seeds?
Unfortunately, marijuana seeds have no defining characteristics that allow you to identify whether they will produce male or female plants. The only way to determine gender is by putting them through germination, planting them, and allowing them to grow. Then all you need is to inspect them at the pre-flowering stage.
Fortunately, this inconvenience can be avoided thanks to the advent of feminized cannabis seeds.
What Are Female Cannabis Seeds?
Female (feminized) cannabis seeds are selectively bred to ensure they only produce female plants, which develop the resinous flowers commonly cultivated for their cannabinoids and terpenes. They are typically produced by pollinating a female plant with pollen from a female plant that has been induced to produce male flowers. Although feminized seeds greatly reduce the likelihood of growing male plants, they cannot guarantee that every plant will develop as female.
Feminized cannabis seeds are selectively bred to produce a high amount of cannabinoids. This means high THC content and greater potency, but there are benefits for the cultivator, too. Female plants eliminates the need to check the sex of each, with the bonus of being easier to grow. and by choosing these as the starting point for your project, you eliminate the risk of producing male cannabis plants. This streamlines the germination process and growing significantly.
If you're new to growing cannabis and are looking for a starting point, Seedsman.com carries one of the finest and most comprehensive ranges of feminized cannabis seeds available today. Simply use our strain finder and choose the feminized option when purchasing seeds, and you’re in business.
What Are Regular Cannabis Seeds?
Regular cannabis seeds are unlike their feminized counterparts, and the difference is in genetics. Regular seeds contain the chromosomes that enable them to be male or female, whereas feminized seeds contain only female genetics. If you’re looking to grow cannabis flower, then feminized seeds are the ones to choose. But if you’re looking to dabble in creating new strains, regular seeds can produce male and female cannabis plants. This makes them ideally suited to a breeding project.
Regular cannabis seeds are free from any engineering, but there’s a 50/50 chance they’ll produce either male or female plants. Their strong genetics means a more stable base for creating clones, too. Regular seeds produce more vigorous plants with a greater ability to handle stress, often resulting in tremendous growth and high yields. Just remember, if you’re going with regular seeds and do not plan on breeding, remove any males from your grow area before they pollinate your female weed plants.
Hermaphrodite Plants
While choosing feminized cannabis seeds eliminates the risk of producing male plants, there is a small caveat: hermaphroditism. There’s always a chance that a small percentage of seeds could turn ‘hermie’ and develop the characteristics of both male and female plants. This makes a cannabis plant monoecious as opposed to dioecious, but there are steps you can take to avoid this anomaly. First and foremost, learn to identify the early signs of hermaphrodite cannabis plants.
Hermaphrodite cannabis plants cause stress, but stress causes hermaphrodite cannabis plants! By ensuring optimal environmental conditions, you can eliminate the chances of your plants turning hermie.
Factors That Can Cause Hermaphroditism in Cannabis
- Genetics
- Changes to the Light Cycle - especially interruption of the dark schedule
- Too much heat
- Too much water
- Not enough water
- pH issues
- Over or underfeeding nutrients to your plants
These are just a few of the factors that can unduly stress your cannabis plant, causing it to turn hermaphrodite as a defence mechanism. It’s bad news for cultivators, but it’s a smart move on the plant’s part. Upon sensing high stress levels, the plant turns hermaphrodite so it may pollinate itself and reproduce, essentially keeping its lineage alive.
The best way to avoid the risk of hermaphroditism due to genetics is to always buy feminized cannabis seeds from a reputable seed bank like Seedsman.com. Seedsman only supplies seeds from quality to genetics, and knowing your feminized seeds are of the highest quality means peace of mind.