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How soon can you tell the sex of a cannabis plant grown from seed? 2019 Updated

In the world of plants, reproduction can happen in a variety of ways. Hermaphrodite plants grow single flowers that have both male and female reproductive organs. Monoecious plants produce two different types of flowers on the same plant. And then there are dioecious plants like cannabis, which produce either male or female reproductive organs.

Because cannabis grows as either a male or female plant, we can isolate the benefits of growing females with or without male interference. Introducing both males and females will result in cross-pollination and thus seeds, which is how a breeder achieves new genetics. On the other hand, removing a male from the garden allows female plants to grow large, seedless buds (called sensimilla). The resinous buds that we consume all come from female plants.

When do marijuana plants reveal their gender?

Cannabis plants go through two stages of life, the “vegetative” stage and the “flowering stage.”

They first go through the vegetative life stage, which you can sort of consider its “childhood” since the plant is only focusing on growing bigger and taller, and gender doesn’t matter. At the beginning of this stage you usually can’t tell what the plant’s gender is.

However, once the plant is about 6 weeks old, it will usually show signs of “pre-flowers” which will alert you to the gender before the beginning of the flowering stage.

What are cannabis “pre-flowers?” 

They are little versions of adult flowers that appear on your marijuana plants relatively early in the vegetative stage.

When I first started growing weed, I learned (incorrectly) that there is no way to determine a cannabis plant’s gender until the flowering stage. But I’ve since learned that pre-flowers can reveal the plant’s sex while it’s still in the vegetative stage! Cannabis plants grow pre-flowers as young as 3-4 weeks from germination for male plants, and 4-6 weeks from germination for female plants.

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.

How to tell the difference between Male and Female Plants

How to tell the difference between Male and Female Plants?

In the case of plants, you may be aware that there are differences when it comes to male and female plants. In some instances, these differences aren’t really a big deal, but in the case of cannabis plants, it is very important for you to know the differences, in the event that you want or need to grow your own buds.

You will have to wait a while to be able to tell the difference, since they have to grow first, in order for you to be sure. However, there are things to look for, which will help you identify the sex of your plants and become more informed.

As a modern cannabis grower, you can use a complete grow tent kit.

These kits are simple to set up and makes it easier to begin growing. You don’t need to go shopping for extra parts. These complete grow tent kits come with everything you need to start growing. This includes all electronics such as lighting with hangers, inline fan with carbon filters, and other necessities like nutrients for the plants. You can save a lot of money and time.

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