1.Plant deep. If you can, bury the stem of the tomato well into the ground when you transplant. The steam and leaves that are buried will end up sprouting roots, you’ll end up with a stronger plant.2. Amend the hole with some crushed eggshells for added calcium. Blossom End Rot is a common problem which can be caused by a lack of calcium,throw a bit of compost in the hole while you are at it. 3. Water from the ground up.