Sow in autumn. Does not like root disturbance. Can be direct sown, or indoors preferably in modules, lightly covering seeds with compost. Require a period of cold moist stratification. Germination in up to 3 months at 15–20°c

Flowering plants need red light waves to bloom, so many grow lights produce more red light that traditional indoor lighting. Some grow light models will let you switch between different light spectrum modes.To find out how many photons are emitted by your grow light per second, find out what its photosynthetic photon flux (PPF) is. It’ll give you a micromole reading (µmol/s). Just 1 µmol is equivalent to 602 quadrillion photons! What are supplemental grow lights for plants? Compact and efficient, this is a smart, space-saving choice – and a wonderful option if you like to use heat mats for seed germination.

Sow in autumn. Require a period of cold moist stratification. Germination up to one year at 13–18°c A variety of specialized electric bulbs have been developed for indoor growing. The most common ones are:Look for lights with ‘veg’ and ‘bloom’ pre-set settings . These will choose the right combination of lights for each stage of the plant’s cycle. Red light or mixed light bulbs are suitable for promoting bud formation in flowering plants as well as keeping the plants shorter. During vegetative growth, plants respond well to blue light. Blue light speeds up plant growth in the vegetative stages while reducing internodal lengths, keeping height levels down and making more efficient use of space.