How to force a cannabis plant to flower indoor

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Changing the cycle of light and dark hours is the key for your marijuana to start blooming no matter what time of year. In indoor crops, with artificial lighting, this change will be much easier, as we can control it by taking a few minimal precautions. Even so, it is important that you know the process and the care that must be followed when we force the flowering of our cannabis crop. Take note and check bud trimmers reviews.

To wait until the end of the summer, when most of the plants of marijuana begin to bloom due to the shortest days and the longest nights, it becomes often interminable, so a good remedy is to force the bloom to obtain as soon as possible our harvest. This consists mainly in balancing the hours of light and darkness to which the plant must be exposed. In addition, if we have an indoor cultivation, with artificial lighting, it is very important to know the previous phase through which the plant must pass until we must force its flowering, as well as what measures we must take to carry it out without putting our cultivation at risk.

First, we must take into account that marijuana plants go through two main stages of growth: the vegetative and flowering. The first one starts once your seedling or clone has taken root and has two or three sets of leaves. At that time, the plant will be about a week to ten days old. From then on, the vegetative stage will last between 2 and 4 weeks, depending mainly on the space it has to develop and the variety of marijuana we grow. As a general rule, the plant will have to grow two thirds between its initial and final size of the vegetative stage and one third more until finishing the flowering. Thus it will be his final size:

During this phase the plant will have to be under light between 16 and 20 hours. A time that has to be combined with a period of darkness, in which the roots of the plant take advantage to grow. Most growers recommend 18 hours of light and 6 hours of darkness each day during the vegetative stage.

Now, once we have achieved the desired size of our plant, we can begin the process of forcing or inducing flowering. For it we will have to pass to 12 hours of light and 12 hours of darkness. In this way, the non-penetration of light will make the plant believe that autumn is coming and it will start to flower.

Cannabis plants require a long period of darkness to activate the hormones that indicate the change of vegetative growth to flowering. Since it begins until it finishes this one can pass from 7 to 12 weeks, depending on the variety and the means of culture. However, most of the varieties will be ready in 8 or 9 weeks.

To know if the plant has started the phase of bloom, we must take into account its sex. After the first two weeks of the new cycle, in the female plants you will observe two white hairs coming out of a small green bulb at each node, while the male plants do not develop clusters of small balls containing pollen. These characteristics will indicate to us that we are on the right way and that the bloom has already begun. Now it only remains to continue the care.

Indications on the cycles of light to stimulate the bloom

We already know that the increase of the time of darkness is the main cause of the beginning of the flowering. However, we must be especially careful with those hours. Before starting the change, it is key to make sure that the light during the dark period does not penetrate anywhere. In the indoor cultures, it is necessary to pay special attention to the chinks of the doors and the windows. In this sense, it is advisable to use your own cultivation cabinets that guarantee airtightness.

In addition, if any of the ventilation equipment produces light we must cover it with adhesive tape, so that our plants spend half the day in complete darkness.

Although the key is in this change of cycle, some growers use a trick that ensures that it works. It consists in letting the plants get used to the darkness during an uninterrupted period of 36 hours and from there to begin the cycle 12/12. Even so, if we see that our plants do not begin to flower as we expect, we can offer additional hours of darkness.

The first two weeks of bloom are especially important, for what the cycle must be fulfilled meticulously and be situated in the same periods. If you start the time of 12 hours of darkness at 8 o’clock in the evening until 8 o’clock in the morning you will have to follow the same schedule during these first days. Once this more critical stage is over, some variations can be established, but not excessive.

Fertilizer and other care during forced flowering

One of the main cares during the flowering stage is to keep our plant well nourished. During this period the levels of phosphorus must be higher than the rest of the nutrients. This will make that we can obtain big heads and rich in THC.

These nutrients must be supplied at each watering when the bloom begins. In the same way, the trace elements are also fundamental for the development of the plant, that is why we must have fertilizers that include them.

Another key moment is the pruning. We will avoid pruning during the dark period; however, if we have no other choice, we must use a green light in our ‘indoor’: this way the plants will hardly notice it and you will be able to work with visibility. In this case, the ideal would be to adjust correctly the light and dark times. For example, you could set the hours without light for your plants from 7 in the morning to 7 in the evening, which will allow you to operate on your crop when you come back from work.

What are the possible disadvantages of forcing flowering?

If we choose to cover our plants in order to guarantee maximum darkness, we may encounter some humidity problems. In this case, a good ventilation will be our best ally to keep at bay the mold, pests or other diseases that may arise. To minimize this risk and according to the budget we have, we can install dehumidifiers or get a opaque and breathable fabric at the same time.

In any case, the best thing to do is to place our houseplants in a place that guarantees the absence of light without having to cover them up or move them around every time it gets dark. Some growers who do not have isolated rooms for their plantations use opaque curtains that can be opened and closed to protect the entire crop.

Another disadvantage of forcing flowering is a possible reduction in production. To avoid this we can count on fertilizers rich in phosphorus, highly recommended for the flowering phase, which help in the growth.

With these recommendations you will get your marijuana buds sooner than expected. To know the perfect moment for the harvest, you will have to pay attention to the color of the pistils of the flowers. When most of them have darkened, they will be ripe for harvest. Now all you have to do is pick them very carefully to preserve their properties intact and put them to dry. In a few days you will be able to enjoy your grass grown at any time of the year.

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