Environmental Requirements for Good Plant Growth
Environment
Underground Environment
Soil improvements
Nutritional Deficiencies
Soil Pests
Planting Media Mixes
Content of Mixes
Plant Food and Fertilizers
Nitrogen purchased in four forms
Phosphorous purchased in the following forms
Phosphorous affects plants in several ways
Too much phosphorus
Not enough phosphorus
Potassium – the most common sources are
Potassium is essential because
Too much:
Too Little
Soil pH
Above ground Environment

Potassium is essential because
Increases plant resistance to diseases
Encourages strong root system
Essential to starch formation
Needed for the development of chlorophyll
Essential for tuber development
Encourages the use of C02 (carbon dioxide)