The breeding of these plants is most important to the THC content within a ‘crop’ of
cannabis [2].
Cannabis is very rarely grown from seed as cuttings (clones) from a single
plant can be propagated and thus a large crop may be produced from a single plant [4].
Male plants are widely considered to have a lower THC content than female plants and therefore this plant is not often grown.
In fact, female plants that remain unfertilised throughout maturity have the highest THC content, these plants have no seed and the cultivation method that results in these female plants with no seeds is known as ‘Sinsemilla’ (Spanish for “no seed”) [5].
Much of the imported cannabis plant material seized in Ireland is of this type