You now have spent time and money on your plants. You have grown a small selection in the hope that you will get some females out of them in the end. If you end up with no female plants out of 15 seeds then send the seed-bank a letter explaining how out of the 15 seeds 15 where male. If you are lucky and sincere in your writing then the seed-bank may send you some free seeds or give you a discount on your next order. Seed-Banks or breeders are not responsible for male/female ratios. It simply is not under their control. People get 100% females and others get 100% males, but it is rare that such a thing will happen. To get 5 or more females in a pack of 15 is a good thing.
Figure 7.4 – Here is another shot of the condition. The male pods are clearly visible.
Notice how the female produces little white hairs and the male produces little ball like shapes. This is the definitive male/female telltale factor. Do not kill away any plants before you see these flowers. It is the only time that you can really say for sure if the plant is male or female.
Figure 7.7 – This is a female plant by BigIslandBud.
There are three things that can reveal your plant’s sex early on but these are not 100% accurate. They are more of an educated guess. So remember these methods can fail to be accurate but most of the time they are a good indicator.
12/12 is easy to explain. Cannabis plants grow outdoors naturally between the months of April to October/November. This means that towards the Sept/Oct/Nov dates the plants will be in flowering. During this time the days get shorter and the nights get longer. When this occurs the plant is under 12 hours of light and 12 hours of darkness. When this 12/12 PHOTOPERIOD occurs the plant is naturally stimulated to flower. If the 12/12 continues then the plant will produce its flowers. As long as 12/12 continues the flowers will grow larger and more plentiful. This is part of the cannabis plants evolution and how it has taught itself when to flower. Naturally as a grower we want lots of flowers so we need to put the plant through a light cycle of 12/12. This means that we must turn our lights on and off at these given ratios.
Most people never get good results or bud quantities from cannabis plants because they have never heard of 12/12.
Force-flowering a cutting is probably the best early sexing method out there. Simply take a cutting from the plant that you want to sex and place the cutting in a cup of water or into a cloning medium such as rockwool. Give the cutting 12 hours light and 12 hours total darkness. The cutting will flower and display its sex. Clones will carry the exact same genetic make-up as the plant it came from, including sex.
Figure 7.6 – This is a picture of a male plant. You can see the male pod clusters clearly. The picture is by the ‘Chronic Couple’.
By now you have managed to set up the basic environment in which your indoor plant will grow. You have your plants in some pots under a grow light with some
What you’re looking for is “pre-flowers.” These are tiny versions of adult sex parts, and when you see them you can tell what sex the plant is going to be. They usually show up in the upper parts of the plant, closer to the lights, but sometimes you’ll search the whole plant and only find a pre-flower on a random branch lower down on the plant.
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Some of the time the stipules (green hair-like growths near where pre-flowers show up) will cross each other on female plants. This certainly doesn’t always happen, as you can see from the pics of female pre-flowers on this page, but while girls can go either way, male plants rarely have stipules that cross each other. So although crossed stipules cannot be used definitively as a way to identify female plants, it can be a small clue to help guide you when you’re not sure. For example, the following female pre-flower doesn’t have a pistil, but the long thin shape combined with the crossed stipules help indicate that this plant is a girl. Whenever in doubt, wait a week and look again!
Male pre-flowers are basically immature pollen sacs. When the plant starts flowering, they will grow and turn into bunches that almost look like grapes.
This female pre-flower hasn’t released a wispy white pistil quite yet
(these turn into buds)
So, without further ado, here are pictures showing what you’re looking for when it comes to pre-flowers. Remember, pre-flowers are found at the V where stems meet a main stalk. But pre-flowers don’t usually show up all over the plant. Make sure to look around in different places, especially near the top of the plant and closer to the lights
But for those of us using our eyes…
Learn how to find tiny pre-flowers at the base of each leaf to determine the sex of your plant in the vegetative stage (at only 3-6 weeks from germination)!