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how to determine marijuana seeds sexs

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We know that determining the sex of cannabis seeds cannot be done. However, it’s unclear as to whether environmental factors have any place in determining the sex of marijuana plants.

MSNL Team / 19th July 2018

While growers may not be able to determine the sex of a seed, does the environment have anything to do with it? This is something else that has been hotly contested online.

Common myths on identifying the sex of a cannabis seed

Typically, marijuana plants cannot be sexed until they have already begun to grow. Cannabis seeds will look somewhat identical and plants in the vegetative stage will also look identical,. As the plants move into their flowering stage, they will start to show very clear signs as to what sex they are. While it would be much more convenient for growers to be able to determine sex before this point. The sad truth is that it’s just not possible.

Unfortunately, there’s not much truth to any of these interpretations. It’s simply impossible to tell just by looking at them what the sex of any cannabis seed is. If it was that easy, feminized marijuana seeds would not be as popular as they are. People could simply buy regular seeds and look at them themselves.

Research is carried out all the time to determine if a plant’s environment has anything to do with the sex it will turn out to be. And while there’s research stating that it does not, there’s just as much research stating that certain species do have their sex determined by the environment. This same research also states that using certain chemical treatments can also reverse the sex of a plant.

While environmental factors may not necessarily determine the sex of marijuana plants or cannabis seeds, it is known that certain environments can change the sex of a plant.

Unlike the male preflower, the female will produce a tiny white hair known as a pistil. When you see the first white hair, this will indicate the plant is in fact female, and an abundance of pistils will emerge once flowering is induced. Sometimes there can be a very thin and narrow growth, similar to the tip of a blade of grass, that later pushes out a pistil.

There are plenty of old school genetics that have stood the test of time, and due to the marketplace during that era, were never feminized. It was from around early 2000 onwards, when the advantages of feminized seeds were becoming commercially popular. Many cultivars that existed during the last 50 years are often preserved in regular seed form, either as a first generation or as a stable IBL. Back crossing or producing a new generation of cultivar should only be done with regular seeds, especially when in-breeding.

When a Cannabis seedling has been left to grow for up to 5 weeks under 18/6, the plant will begin to exhibit very small preflowers. Typically these preflowers reveal themselves once flowering is induced, however it is possible to see which sex you have when knowing what to look for.

Top Tips On Sexing Cannabis Plants

Working through a bunch of seeds and narrowing down the best female plants to one keeper, will reward you with the ultimate mother plant, and can often soften the blow of paying three figures for a pack of seeds in some cases. If you truly want to find the best of the best, using regular seeds will allow for the most genetic diversity.

For those who have the desire to make your own custom genetic crosses, starting your own breeding project in the comfort of your own home is easily achievable. For this you will need to invest in regular seeds that will allow you to grow either male or female plants. It is a good idea to start with at least 10 seeds to allow for a much wider variation, and greater choice of male to females. Some seedlings may underperform and be discarded early on, however with 10 seedlings, there is a good potential desired ratio. Labeling your pots with numbers and strain names, will make life much easier when sorting through the different plants, especially when taking cuttings before flowering for preservation purposes.

When investing the time and money into a large pheno hunt, it is better to work with regular seeds over-feminized seeds. During this process the male and female plants will need to be separated well before flowering. There will be some impracticalites associated with this method such as wasted hydro system space, use of nutrients, growing medium, dedicated space, and maintenance. Working with a large number of plants to select from will allow you to access the best looking plants, based on height, structure, internodal spacing, aroma, leaf pattern, and overall vigor.

Male preflowers will look like a small cluster of green, oval-shaped growth. They will be noticeable between the internodal growth and can even look like a female preflower minus the pistil. By this point there is zero need to worry about male pollen sacs and cross pollination, and after several weeks, it will be evident if you have an abundance of tiny male preflowers forming.