This happened to me! In my case, it was a lack of nutrients in a potted tomato plant, so adding a fertilizer with nitrogen should help a lot. Or, if you have compost, make some compost "tea" by putting some of your compost in a container, adding water to "steep" just like a tea bag, and pouring off the nutrient-rich water into your tomato plants. Good luck and happy tomatoes!
I definitely agree with the lack of nutrients comment! But also keep in mind that plants, in an effort to keep themselves healthy and growing, will sometimes naturally shed lower leaves by letting them yellow and fall off. There can also be another culprit called "burning up" the plant by providing too much nutrition. So be careful! Good luck and happy gardening!
Tomato plants are prone to blight, which causes the leaves to turn yellow and fall off. The blight also sometimes causes spots on tomatoes themselves. This is hard to prevent and some gardens seem to be prone to it. But there are a few things you can do to minimize it: remove the diseased leaves right away and dispose of them in the trash; do not compost your tomato plants at the end of the season, burn them or throw them in the trash; rotate your crops so tomatoes are not back in the same spot in the garden for at least three years; water with a soaker hose to avoid getting the leaves wet; and keep a heavy layer of mulch (straw or newspaper works well) around the bottom of the plants. Some tomato varieties seem to fare better than others against the blight, so you also should look for resistant varieties if this is a recurring problem for you.
by dcook792 7 years ago
my leaves are turning yellow on my tomato plant
by Sherri 7 years ago
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