Read the label prior to purchase to ensure this. Nitrogen Nitrogen is needed for the green, leafy, vegetative growth of plants. When an element is lacking, the plant will show deficiency symptoms. Deficiency symptoms for nitrogen include an overall pale yellow color of the leaves, and plants which are dwarfed or stunted. Therefore deficiency signs will appear first in older leaves.
Nitrogen moves easily through the soil in the soil water.
If it is washed below the root zone of the plants, it will not be available for plant use. Therefore,it is the fertilizer element most often lacking and most often needing replacement. This is why plants may appear yellow and stunted in early spring when the soil is still cold, even if nitrogen fertilizer has been applied. As soon as the soil warms up, they will appear green and vigorous. Too much nitrogen or a nitrogen imbalance can delay flowering, fruiting and seed set.