Probably one of the most important parts of growing indoors is providing your plants with the correct light, as you are imitating the outdoors.
Selecting the right colour spectrum for your plant is very important. Sunlight contains the complete spectrum of light including all colours of the rainbow: red through yellow to blue and violet. Plants use the full spectrum for photosynthesis, although red and blue light seem to be most critical. Red light stimulates vegetative growth and flowering, but if a plant gets too much red light, it will become tall and spindly. Blue light regulates plant growth, which makes it ideal for growing foliage plants and short, stocky seedlings.
No matter what types of plants you are growing indoors, you must be sure to give them a rest. When it’s dark, plants respirate, which is an important part of their growth process. The balance of rest time to active growth time affects many biological processes, including the growth rate, and the setting of buds and fruit.
The distance between your plant and the light is very important, plants grow towards light and can become stretched and “lanky” or “spindly” if the light is too far from your plants. If the light is too close, you can burn and kill your plants.
Insufficient light will result in weak plants and small yields.