Horticulture - Unit 4. Environmental Requirements for Good Plant Growth. The Plant Environment. In order to grow properly, plants require a certain environment. This environment is divided into two parts: The underground in which roots grow and live.
Environmental Requirements for Good Plant Growth
Air & Liquid = 50%
Water = 25%
Air = 25%
Solid portion = 50%
Mineral Matter = 45%
Organic Matter = 5%
Mix is uniform
Mixes are sterile
Soil less mixes lighter in weight therefore easier to handle
Good moisture retention and drainage are possible through the proper combination
Since they are light, the containers may be blown over
Mineral content is low - Minor plant food elements may be missing
Plants may hesitate to extend roots when transplanted to soils.Advantages and disadvantages of planting media mixes.