Calcium is an often neglected plant food essential to plant growth. Calcium (15% N, 25% Ca0) combines quick acting Calcium and Nitrogen. Calcium deficiency shows as poor growth and colour in the leaves
Total Nitrogen (N) 15.5% Nitric Nitrogen 14.5% Ammoniacal Nitrogen 1% Calcium Oxide (Cao) 26.6% soluble in water.
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Calcium Nitrate fertilizer for Orchids