what provides calcium to tomatoes
Almost anyone can grow great tomatoes if you follow these simple tips: 1  The more sun, the better. 2  If youâre growing in containers, go BIG. Especially for large-fruited varieties, consider using at least 10-gallon containers for each plant. 3  Be consistent with your watering!  Never water tomatoes from 1  overhead. Give them plenty of calcium and magnesium.