- Written by Robbi Hoy
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Helpful tip from The Garden Geeks: Prevent Blight, Blossom-end rot, and other common tomato diseases by sprinkling a handful of Nonfat Powdered Milk in the hole before planting transplants. After planting, sprinkle 2 more tablespoons on top of the soil. Repeat this topdressing every few weeks. You can also grind up chalk and do the same. These diseases are caused by calcium deficiency.