QUESTION: What are the signs of overwatering tomato plants?
ANSWER: If the soil is moist and you notice signs of either underwatering or overwatering tomato plants, you should look closer at the condition of the soil and make adjustments.
These signs may also include stems which have turned partly yellow or green while the leaves show other symptoms like dormancy, blistering, or abscission, which is the permanent separation of leaves from the plant.
If the case is severe enough, there are simpler ways to differentiate between over and underwatered plants and stems by checking the roots Whenever a plant has received excess moisture beyond its requirement, roots will turn darker in color instead of the usual pale, healthy color, and may even appear slimy.
This issue can be solved by gently pulling it, shaking off excess soil, and resting the roots on newspapers which will absorb the excess water.
Next, place it once more in a container that snugly accommodates its roots and add compost to the contours. In the event of excessive rainfall, you could always suspend a plastic sheet or tarp over the plant and remove it once the rain stops.