Southern Ag Stop Blossom-End Rot of Tomatoes, 32oz - 1 Quart Size: 1 Quart Prevents tomatoes blossom-end rot due to Calcium deficiency. Corrects Calcium deficiency. CONTAINS: 31% or 3 lbs. Calcium Chloride per gallon. For large quantity discount consideration or to request a mixed multi-pack, please message us.