Let’s talk about the most common causes of black spots on tomatoes. Low soil calcium and blossom end rot Low soil calcium can cause black spots on tomatoes, including blossom end rot.

Waiting for the first ripe tomatoes from the garden seems like an eternity. When the plants begin to develop a rotten spot on ...

Question: Every year some of my tomatoes get large, wet, black spots on the fruit. What causes this and how to prevent it?

Septoria leaf spot Q • The lower leaves of my tomatoes are turning ... What’s the cause, and what should I do? A • While home grown tomatoes are tasty, these plants are susceptible to ...

Blossom end rot Q • My tomatoes are starting to ripen and I ... While tomatoes are prone to many diseases that can cause spots on both leaves and fruit, it sounds like your tomatoes have blossom ...