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sexing marijuana seeds

Sex Determination: After Planting Marijuana Seeds

Identifying Males and Females from Marijuana Seeds

When Growing marijuana seeds there is a chance it could be female or male, you can increase your odds for females if the growing conditions are optimal. After planting marijuana seeds and letting the plants vegetate for a while, the next step is to determine the sex of the plants also known as sexing. Determining the sex of a plant can be tricky if you don’t know what to look for. It is best to determine the sex as early as possible. Determining a plants sex protects against unwanted pollination resulting in marijuana seeds . Males have no use in the garden, unless you are planning on breeding plants. They also could be disastrous to the crop if their flowers open and pollinate the female flowers. Pollination creates marijuana seeds which lowers the potency and overall usable weight. Pollinated female flowers will spend all their energy making seeds instead of buds.

Determining Sex After Planting Regular Marijuana Seeds

There are several methods you can use to determine sex. Early growth in a plant such as height and vigorous growth can indicate a sign of a male but this is not an optimal way of sexing a plant. Discussed below are the two best ways to determine sex in young plants that you grow from regular marijuana seeds.

The first way to determine sex is early visible detection. In some strains but not all of them, there is a single small female or male flower that shows in vegetation. The flower can be located by looking at the nodes of the plant where the leaf petioles and the stem meet. The plant is the same sex as the little flower showing. Normally my plants in vegetation start showing sex after they are about 30 centimeters tall.

The small female flower is called a calyx.

The small male flower looks like a ball it is a pollen sac:

When the above method does not show a small flower there is a different way to determine sex and that is to induce early flowering. Light cycle manipulation, is forcing a plant to flower and show its sex. This can take up to ten days to do. It also takes ten days to switch back to vegetative growth. Instead of forcing the whole plant to flower a simpler way is to take cutting of the plants you want to determine sex.

Label the clone and the mother plant so you know what cutting came from the matching mother plant. Place cutting in a cup of water or in a planting mix under a flowering light schedule of 12 hours on and 12 hours off for at least 10 days. Giving the cutting more darkness speeds signs of flowering by a few days such as 8 hours of light and 16 hours of darkness. Within 10 days the cutting will show flower signs and indication of sex is visible. Once you have determined the gender of the cuttings, you should get rid of any males. So remember if you grow marijuana seeds you have to determine sex of the plants so males don’t pollinate your females. Choosing marijuana seeds can be difficult, but if you would like to avoid checking for sex make sure you get feminized cannabis seeds.

When Growing marijuana seeds there is a chance it could be female or male, you can increase your odds for females if the growing conditions are optimal. After

sexing marijuana seeds

Well, let us tell you now, it is all a load of bollocks. There is no way to tell the difference between male and female cannabis seeds by looking at them. In fact, it is widely accepted that the sex of a cannabis plant is not determined until a few weeks before flowering.

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Can You Tell The Sex Of Cannabis Seeds?

For those who don’t use feminized seeds, being able to tell the sex of a cannabis seed by looking at it would be a pretty handy skill. But is it possible?

If you are a veteran of the cannabis community, or spent a lot of your time reading up on cannabis, you may have heard that it is possible to tell the sex of cannabis seed simply from its appearance. There is even a chart floating about out there that describes the physical differences between male and female seeds.

Well, let us tell you now, it is all a load of bollocks. There is no way to tell the difference between male and female cannabis seeds by looking at them. In fact, it is widely accepted that the sex of a cannabis plant is not determined until a few weeks before flowering.

Even feminized seed, which have been bred to have 99.9% chance of growing female, can turn into male or hermaphrodite plants if put under a ton of stress while growing. This is very rarely a worry for feminized growers, as they don’t tend to stress out their plants to this extreme extent – but it is possible.

Think about it. Why would breeders across the globe go to all the effort required to produce feminized cannabis seeds if they could simply look at regular cannabis seeds and categorize them? It isn’t some conspiracy or well-kept trade secret.

DETERMINING THE SEX OF YOUR CANNABIS BEFORE IT COMES A PROBLEM

While being able to determine the sex of a cannabis seed by looking at it is a myth, being able to sex your cannabis early isn’t.

Normally, you would wait until your cannabis plants are done with vegetative growth, and switch them over to flowering. You then watch like a hawk for any signs of sex, and move the males as soon as possible. This is risky, though, because if you leave it too long, you risk the chance of pollination – turning your bud into seeds. Unless you are getting into breeding yourself, this is something you probably want to avoid.

If you don’t want to take the risk, then sexing your cannabis early is pretty easy, and stress-free. It basically involves placing a black bag over a small section of the plant during the vegetative stage to force pre-flowering, before allowing it to revert back. This gives you a clear idea of what sex your plants are, without undue worry, wasted time, or effort.

If you are growing your own cannabis, you are doing it to produce some prime bud. For this reason, it is extremely important to identify.

It is a sad truth that you cannot determine the sex of a seed by looking at it. If you think you can, you have been lucky. Nothing more. However, hopefully, our explanation of the measures you can take to determine the sex of your cannabis plants will help you keep your grow room male free for years to come!

Written by: Zamnesia
Zamnesia has spent years honing its products, ranges, and knowledge of all things psychedelic. Driven by the spirit of Zammy, Zamnesia strives to bring you accurate, factual, and informative content.

This can be beneficial for breeders looking to create a new strain or breed more seeds. For most growers though, it is an undesirable outcome. This is why sexing marijuana plants before that happens is so important.

Male or Female? Sexing Marijuana Plants

Sexing marijuana plants is very important for growers. If this is left unchecked, one plant could destroy an entire crop.

Female and Male Marijuana Plant

Male and female marijuana plants are very different. The main function of a male plant is to collect pollen. This is used to fertilize the female marijuana plant. Eventually, the pollen sac containing that pollen will burst open. When it does, it will rain down on any female plants in the area. Those female plants will then turn their flowers to seed, leaving no buds for the grower.

This can be beneficial for breeders looking to create a new strain or breed more seeds. For most growers though, it is an undesirable outcome. This is why sexing marijuana plants before that happens is so important.

Sexing marijuana plants can be done before the plant reaches full maturity. For males, it can be done when the plant is three to four weeks old. Females can be sexed when they are four to six weeks old. These timeframes are when the pre-flowers will develop.

Within the stem of every marijuana plant, there are stipules. These appear within nodes, in order to support the flower. While the stipules cannot be seen, the nodes can. This is the area where the branch shoots out from the stem. This is where the pollen sac will appear on males, and the buds will form on females.

Pollen sacs on male plants look like small balls. They do not have anything shooting out from them and are fairly symmetrical in shape. They sit right within the node and will continue to until maturity.

Pre-flowers on female plants look quite different. These are elongated and while still symmetrical, are not a ball shape. This pre-flower is known as a calyx, and not a pollen sac. From the calyx pistils will form. These appear as long white hairs, stemming right from the calyx. The calyx will later develop into a bud, or flower.

How to Sex a Marijuana Plant

Looking at the anatomy of a marijuana plant is a great way to sex marijuana plants. However, sexing marijuana plants can be done throughout the entire grow stage as well.

Step 1: Watch how they germinate

This is by no means a foolproof way to determine sex. Many growers have found though, that different sexes of marijuana geminate differently. If the sprout emerges from the seed at the top of bottom, it is likely a female. If the sprout germinates out the side, there is a good chance it is male. But the only way to be 100% sure of gender is to look at their pre-flowers when they develop.

Step 2: Identify growth patterns

Some growers find they can sex their plants during the vegetative stage. This method is most successful if the plants are being grown outdoors or otherwise getting natural light. As the plant grows, females will have more branches. Males tend to be shorter and have fewer branches. While this stage is too early to tell if plants are male or female, it is a good starting point to see which plants need to be watched more carefully later on.

Step 3: Watch for maturity

Although male plants will be shorter during the vegetative stage, they will mature faster than females. This means they will soon start to grow taller. This enables them to drop the pollen in their sacs onto the females and fertilize them. In addition to being taller, male plants will also start to develop pollen sacs as they continue to reach maturity.

Step 4: Look for flowers and pistils

If height and age are not good enough indications, growers can wait until their plant begins to flower. The pollen sacs on a male will open to reveal small white or yellow flowers. Female plants will not show these characteristics. They will form the sticky pistils, meant for catching the pollen dropped on them by the male.

Hermaphrodite Cannabis (Hermies and Nanners)

Sometimes throughout the growth stage, plants will show both female and male parts. This is known as a hermaphrodite, or a hermie, plant. When it happens, it can make sexing marijuana plants even more difficult.

There are two different types of hermie marijuana plants. The first is when the plant simply has both a calyx and pistil and a pollen sac. In these instances, these two anatomical parts will be in separate areas of the plant. Although they may grow close together.

The second type of hermie plant is known as a banana, or nanner for short. In these cases, the pollen sac protrudes from the bud. It is generally longer in shape and hangs down, like a banana. Sometimes, these nanners grow in a bunch, also just like bananas.

If a plant is a hermaphrodite, it is likely due to stress during the grow period. For this reason, it’s important to ensure there are no light leaks in indoor grow spaces and that temperatures are not too high. Outdoors, if a branch snaps off and is then repaired, this could also cause stress that makes the plant turn into a hermie. The other reason for getting a hermie, which is less common, is the marijuana plant is predisposed to hermaphrodite tendencies. This means it is within the genetic makeup of the plant.

Can you sex cannabis seeds?

While sexing marijuana plants that have already begun growing is easy, sexing cannabis seeds is not. In fact, it cannot be done.

This is because environmental factors during the first few weeks of life can greatly affect a plant’s ultimate gender. The plant is not yet sure of what sex it will be and as such, the grower cannot be certain either.

Using the process of identifying where the seeds sprout is the closest one can come to determine the sex of a seed. However, this still has about a 90 percent success rate and is not foolproof.

Conclusion

Sexing cannabis plants before they reach full maturity is important for any grower. It will ensure they yield the buds they are after. It will also ensure they don’t destroy an entire crop because a male turned the female plants beautiful buds into seeds. Following these steps, sexing your marijuana plant will be a breeze!

Well, let us tell you now, it is all a load of bollocks. There is no way to tell the difference between male and female cannabis seeds by looking at them.