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Superphosphate is a vital element to plant life, and vital to the transfer of the sun's energy to plant food and must be regularly applied in small quantities through the growing season. Like Nitrogen, it is an essential part of the plants makeup. Leaves that appear blue to purple in color indicate phosphorous deficiency.

2.3.2(22) + Zn is a combination of three Macro elements and one micro element. Nitrogen (Green large leaves), Phosphate (Root