The elements other than N, P and K which are considered nearly as important as N, P and K but are not considered micronutrients. If the pH is not within the acceptable range, nutrients may not be absorbed to maximum capacity. Phosphorus promotes and stimulates early growth and blooming and root growth. It hastens maturity and seed growth, and contributes to the general hardiness of plants. Phosphorus is a macronutrient.
Potassium is a macronutrient.
Mineral soil amendment. The container in a hydroponic system which holds nutrient solution in reserve for use. Vermiculite has excellent water-retention qualities and is a good soil amendment and medium for rooting cuttings. WICK Part of a passive hydroponic system using a wick suspended in the nutrient solution. The nutrients pass up the wick and are absorbed by the medium and roots.