How much light does cannabis need in veg?
Marijuana is a short-day plant, so light is very important for plants in the vegetation stage, because it is what they use for photosynthesis and grow strong and healthy, so if they get more light, they will grow as much as possible.
In general, the most common cannabis plant stage photoperiod is 18 / 6 (light / dark), but it can be any combination of light and dark (e.g. 20 / 4, 19 / 5, 17 / 7), as long as they do not have more than 12 hours of darkness every day, as this will lead to flowering.
Marijuana vegetation stage
The cannabis vegetation stage is usually shortened to a “veg stage”, which is part of the growth cycle of cannabis plants. During vegetation stage, give the young plant a larger container to grow so that it can mature and ready to bloom.
For best results, they are introduced into increased light and provide lower relative humidity (RH) than when breeding, but higher than what they obtain in flowers.
In indoor marijuana cultivation, the “veg” room (sometimes referred to as pre flowering) is where rooting clones or seedlings in the nursery are transferred to continue to mature and then turn to flowering and harvest.
In this vegetative growth stage, plants slowly get rid of the childcare period accepted in the early rooting stage, and gradually harden to adapt to stronger light and dry conditions, so as to maximize the yield of flowers.
Most of the elongation of plants occurs in the vegetative growth stage. During the vegetative growth stage, they also increase their mass and volume. However, in the first few weeks of flowering (or 12 / 12 photoperiod), they will continue to increase height and size, and then transfer their energy to flowering.
The vegetation stage is crucial to the size and quality of the final harvest. This is an opportunity to give your plant the best start before flowering, or to pick a weaker sample instead of taking up valuable flowering space with a plant that may not perform as well as its peers. In the vegetation stage, it is important to increase water to help plant development. As the plant grows larger and larger, the root grows outward. It’s best to pour the water further, so that the tip of the root can absorb it more easily. Plant growth is based on the rate at which leaves collect light and convert it into photosynthesis.
For indoor growing rooms, plants should maintain an 18 hour daytime light cycle and a 6-hour nighttime light cycle. This mimics the natural light cycle that marijuana plants receive outdoors at this stage of growth, thereby preventing plants from flowering. Some growers choose to keep the light at full power, but set the light and dark cycle alternately to 6 hours on and 2 hours off. This does not trigger flowering because the 12 hour dark light cycle is the beginning of the flowering phase of the plant and allows you to maintain full intensity light without undue stress on new plants.
To determine the correct amount of light for the crop, you need to multiply the length of the growth space by its width to obtain the growth surface, and then multiply the obtained figure by the required PPFD level.
The PPFD of cannabis seedlings, clones and parent plants is only 200 – 400 μ mol/m ²/ s. They are very satisfied. Cannabis plants in the vegetative stage need 400 – 600 μ mol/m ²/ s. Flowering plants usually need 600 – 1500 μ mol/m ²/ PPFD of S, and the concentration of CO in the atmosphere, A study found that the maximum yield of cannabis was 1500 – 2000μ mol/m ²/ S when natural CO2 increased to 750 ppm.was used at a temperature of 25 – 30 ° C .
Contemporary indoor cannabis cultivation usually involves at least one of three artificial light sources: HID, CFL and LED. Growers often use a combination of grow lamps. Of course, there are other older lighting technologies. No matter what lighting decision you make, please choose lamps optimized for the plant growth stage. Growers have different lighting technology preferences, but the cannabis industry is increasingly using LED technology in plant growth and flowering growth stages.