If you are planning to breed marijuana strain, then a perfect match of the male marijuana plant is the main key. However, when trying to cultivate marijuana plants, female sex is all it is about. When growing, female sex is not often assured of having; unless you bought some feminized seeds from the renowned seed bank, then there are higher chances of producing one. But for regular seeds of marijuana, it is close to impossible to produce female sex. About seventy-five percent of the plants will turn into males.
In this way, you can increase the higher chances of obtaining a more female ratio than males. If provided with nutrients abundant in potassium, the higher likelihood that you can produce male plants at this very early stage.
How to Determine Male From Female?
To easily identify female marijuana plants from males, it is best to observe its flowers. Both sexes produce flowers; however, the only thing that differs females from the male is the blooming period of it. Generally, male plants will likely bloom ahead of the female.
When you reach the flowering period, you can transition into a 12/12 photoperiod and use a higher pressure of light made from sodium, preferably. It has a red biased spectrum and likewise copies the natural shifting of the season from summer to autumn.
During the flowering stage, you can reduce the level of humidity to around forty to fifty percent and do not reduce it further, even just one level. With this, you are reducing the occurrence of stress, which can provide other problems apart from developing males. At this point, though, the sex of your plants is already stabilized if the vegetative stage was regulated properly.
Pubescent plants: Maintain humidity at 70% RH. Use a hygrometer religiously to ensure ideal moisture content of the growing medium. Maintaining correct humidity is made easier with a humidifier/dehumidifier unit always at work in the grow space. Continue to monitor the moisture content of the grow medium. Overwatering and overdrying are stress vectors that can encourage males.
There are techniques and tricks of the trade that can be used for increasing the likelihood of getting more females from regular seeds. The key words here are a “stable growing environment.” Stress tends to produce more males, and undue stress during flowering can turn plants intersex.
Metal halide lamps are ideal for the vegetation phase of cannabis. They are blue biased in their spectrum and imitate summer light effectively, which is the natural vegetation period of cannabis. When the 12-12 switch is made to promote flowering, switch to a high pressure sodium light. These a red biased in their spectrum and imitate the red-shifted light of autumn.
HIGHER HUMIDITY AND MOISTURE IN AIR AND SOIL
Young plants: When plants are young, make sure they maintain a high humidity of at least 70–80% RH. This is easily done with a humidity dome during the infant stage. Make sure the growing medium does not dry out too much. There is a fine line between maintaining a healthy wet-dry cycle and overdrying. The stress of a too-dry medium will encourage male development.
Light that is in the blue spectrum during vegetation promotes female development. Fluorescent lights should be white or blue spectrum for infant plants. Refrain from using the purple/red-tinted fluorescents, which are better for flowering.
The other downside of 24hr light exposure during vegetation is poor root development and interrupted gas exchange in the rhizosphere. Root development occurs predominantly at night, and necessary oxygen exchange occurs more efficiently at this time too. Healthy roots mean healthy plants.
In the rush to get buds in the jar sooner, it is always tempting to expose plants to 24hrs of light during the vegetation cycle. The plants may grow larger sooner, but this increases the risks of males developing.