Sex/ Male & Female
Joined: 15 October 2003
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Topic: Sex/ Male & Female
Posted: 23 February 2006 at 12:40
What percentage of these seeds will be female?
It is usually best to assume a female/male ratio of 50:50. Therefore, germinate twice as many seeds as you intend to grow. In practice, the natural femae/male ratio is more like 65:35. This is because cannabis spreads its pollen through the air, without the need for pollinating insects, and therefore requires fewer males than females.
Cannabis will only show its sex once flowering has begun. Cannabis begins to flower when it receives 12 hours of light and 12 hours of uninterrupted darkness in each 24-hour cycle. Once this light cycle (or photoperiod) is initiated, the first flowers should be visible within 2 weeks.
Female flowers are distinguished by their white hairs, which first appear in pairs at the top of the stem and branches and at the internodes where branches emerge from the stem. These hairs will increase in number, thicken into clusters and change colour from white to orange as flowering progresses.
In a natural environment, where male and female cannabis plants are allowed to grow together unimpeded, male pollen will enter the air, stick to the hairs of the female flowers and form seeds. The female flowers or buds familiar to most cannabis-lovers are actually unfertilised seed pods which, given normal conditions, would contain dozens or hundreds of seeds.
The unpollinated female flower of the cannabis plant contains the highest concentration of THC (the prime active ingredient in cannabis). The female flower is made up of clusters of calyxes, each of which produces a pair of hairs (pistils). The calyxes and pistils are covered with tiny, THC-rich resin glands whose purpose is to protect the flower-cluster and to help pollen adhere to the pistils in order to reproduce. Once pollination occurs - when a pollen grain adheres to a pistil long enough transfer its genetic information - that calyx will stop producing new resin glands and begin forming a seed.
Therefore, a female flower that has been exposed to more than a few grains of pollen will almost always be less potent than an unpollinated one. Seeded buds also weigh far less once the seeds have been removed. This is why the term Sinsemilla (or sin semilla - without seed) is traditionally applied to high quality cannabis from all over the world.
A female plant at the start of its flowering-cycle will display few calyxes - singles or pairs at each internode. If such a plant is heavily pollinated, ie if all or most of those calyxes receive pollen, then it is quite possible for that plant to cease production of new calyxes and spend the rest of its life-cycle producing seeds in the few initial calyxes. In this case, the plant will not grow the oversized buds seen in most modern hybrids.
Yes, Sensi does sell feimised seed. See: feminised cannabis seeds
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