Extreme fluctuations of higher or lower pH can cause deficiency or toxicity of nutrients. The following is a brief guideline of the role of essential and beneficial mineral nutrients that are crucial for growth. Eliminate any one of these elements, and plants will display abnormalities of growth, deficiency symptoms, or may not reproduce normally. Macronutrients Nitrogen is a major component of proteins, hormones, chlorophyll, vitamins and enzymes essential for plant life. Too much can delay flowering and fruiting.
Deficiencies can reduce yields, cause yellowing of the leaves and stunt growth.
Phosphorus is necessary for seed germination, photosynthesis, protein formation and almost all aspects of growth and metabolism in plants. It is essential for flower and fruit formation. Yields of fruit and flowers are poor. Premature drop of fruits and flowers may often occur. Phosphorus must be applied close to the plant's roots in order for the plant to utilize it.