Growers identify plant sex by identifying pre-flowers, which are small structures that form at the nodes during late vegetation.
Female cannabis plants are the main focus of casual growers looking to harvest a personal stash. But, depending on their genetics, female plants can look drastically different from one another. Some remain small, producing dense canopies and significant lateral growth. Others grow in excess of 3m, produce massive harvests, and look more like trees than regular garden plants.
From psychoactive cannabinoids to aromatic terpenes, cannabis features many traits that make it unique within the plant kingdom. However, the uniqueness of the plant doesn’t stop at the phytochemicals it produces.
IDENTIFYING FEMALE CANNABIS PLANTS
Cannabis, like those who love it, doesn’t always stick to the rules, though. Sometimes, this dioecious plant species goes against the grain and develops both male and female reproductive organs. These specimens are known as hermaphrodites. Either genetic or environmental factors, or both, can cause plants to develop this unusual trait. Having both buds and pollen sacs, they end up developing the ability to pollinate and reproduce with themselves.
Even if you have all of these bases covered, plants can still pollinate themselves due to poor genetics. Plants with a bad genetic history and too much genetic variation are prone to becoming hermaphrodites. For this reason, it’s important to shop with reputable companies that offer high-quality seeds with stable genetics.
To avoid this issue, try to maintain a stable environment in your grow room. Use a thermo-hygrometer to monitor temperature and humidity, keep your light schedule strict, and ensure your plants get all the nutrients they require.
Cannabis growers and breeders use this trait to their advantage, since it allows them to separate male and female plants. This enables them to prevent the flowers from becoming fertilised and going to seed, which results in better quality flowers, known as sinsemilla.
Most growers who re-veg say that yields decrease the second time around. So while re-vegging may cut down on the amount of time it takes to grow a plant, it might not produce as much.
As mentioned above, cloning a plant while it’s in the flowering stage is called monster cropping. To successfully do this, take clones from the lower branches of a plant when it’s in the second or third week of flowering.
Cloning/Preserving a phenotype
Also, change the plant’s nutrient regimen, giving it nutrients more conducive to early-stage growth. It will need more nitrogen for root and leaf development, as opposed to the high amounts of potassium and phosphorus it likely received during flowering.
Post-harvest re-vegged cannabis plants often take a little bit of time to take off at first and some strains may not even be receptive to this method at all. Early growth on a re-vegged plant may exhibit stress-induced mutations like single-fingered leaves and odd node patterning, but these issues should go away after a few weeks if re-vegging is successful. Plants that re-veg successfully can display increased vigor after the initial transition.