Greenhouses harness the sun's rays to heat the interior air.
The palm is grown as a pot-plant in greenhouses.
As regards water, its deficiency or excess is a relative matter, and although many of the minor maladies of pot-plants in windows and greenhouses controlled by amateurs depend on its misuse, water alone is probably never a primary cause of disease.
in greenhouses where plants requiring very different optimum temperatures and illumination are kept together.
When cultivated in greenhouses liliums are subject to attack from aphides (green fly) in the early stages of growth.