Improvements in and relating to rooting and flowering of plants and illuminating plant growing environments

摘要

A method is described for illuminating a horticultural growing environment without interfering with plant development, comprising illuminating the environment with light having a peak wavelength in the range 510-535 nm. Also described is an associated apparatus, comprising at least one cluster of LED's having a spectral peak centred in the range 510-535 NM. Preferably, the radiation intensity is not more than 15mWm-2 at the plant. There is also a monitoring system comprising an LED light source with a peak wavelength in the range of 510-535 NM, at least one CCTV camera which is sensitive to the above wavelength range, and a way of activating the light source in response to movement, time, date or demand from an operator. A method is also described for promoting the flowering of a plant, by illuminating the plant with light having a peak wavelength in the range of 605-645 NM as a supplement to the light the plant is normally exposed to. There is also a method of promoting root growth of plant cuttings, by illuminating the cuttings with red light at a first illumination intensity and blue light at a second illumination intensity, as a supplement to the light the cutting is normally exposed to.