Marijuana plants are called long evening or brief day plants, since they require a long period of darkness to trigger the plant's hormones to alter from vegetative growth to flowering. These light receptors are color pigments in the fallen leaves called Phytochrome Red (PR) and Phytochrome Far Red (PFR). These pigments acquire their labels from the types of light they absorb. PR absorbs red light between 660 and 760 nm and PFR takes in red light in between 760 and 800 nm. These two pigments chemically respond to the light and trigger the plant to flower or not. In marijuana plants, the typical presence of PFR shuts off the flowering signal. The degree of PFR is what you can manipulate by adjusting the photoperiod. PFR is rapidly created when plants are exposed to light which contains far red wavelengths. When there is light, the PFR and PR keep a balance. When the sunshine lowers, or the lighting schedule changes, the darkness slowly switches from PFR to PR. As an outcome of this, PR levels slowly improve and the PFR slowly lessen throughout the dark duration. When the light returns, or if a percentage of much red light interrupts the dark period, the PR instantly alters back to PFR. If the plants lack light for long enough, the PFR will lower past the tipping point. This lower level of PFR shows to the plants that fall is approaching; and the marijuana begins flowering. Generally, the existence of PFR, due to long hours of light and short hours of darkness, keeps the plants in the vegetative stage. If the plant experiences enough hours of darkness, numerous of the PFR revert to PR; and the minimized degree of PFR shows the plant hormones to start flowering. The Best Ways to Start Flowering Cannabis Due to photoperiodism, you can easily trigger marijuana plants to flower simply by changing the light patterns-- lowering the light from 18 hours a day to simply 12 hours…