Nutrients are absorbed by the plants roots or leaves either through a medium or by foliar feeding. All the elements in the environment intermingle and play a part in the birth, development, and death of the plant specie. The sun is the best source of light. Tap water may contain high traces of minor elements such as Chlorine and Lead. Stagnet air allows certain insects to thrive.
Air temperature plays a crucial role in the survival of a plant.
The increase of CO2 also increases the temperature medium. The PH and ratio of the solution determine the rate of each element uptake. The blue spectrum mainly pertains to vegatative growth, while the red spectrum develops the flowering cycle. Light is usually measured in Lumens and the more lumens available per watt or energy source the better. Air Humans breath in oxygen, while plants breath in carbon dioxide.