QUESTION: How do I know if I overwatered my tomato plants?
ANSWER: If you’ve overwatered your tomato plants, the plants will show it with wilted leaves and stems that are discolored to yellow or brown and may even fall off. You may also see blisters or bumps on foliage and cracked fruits. Roots can also show the signs of overwatering by turning dark in color instead of their healthy pale and having a slimy texture.
You can help revive an overwatered tomato plant by gently pulling it up and brushing the dirt out of its roots, then placing it on a stack of two or three newspapers to dry out.
When you’re ready to put the plant back in its pot once the roots have dried, choose a pot just large enough to hold the plant’s roots, and fill in around the roots with fresh compost. If heavy rains are contributing to overwatering, you can protect the plant from rainfall with a plastic sheet or tarp draped over it, which should be removed once the rain has stopped.