Can you buy spray on fertlizer with calcium for tomato end rot?
Tomato End Rot
Certified GKH Gardening Expert
Some people say that foliage spraying with epsom salts will help with blossom end rot, and it may. But in most cases, blossom end rot happens because the plant is not getting quite enough water - and therefore can't draw up quite enough calcium from the soil.
Spraying with epsom salt water can only help, but increase water to the plants as well.