Q: I planted a tomato six weeks ago and just recently the leaves have started to curl from side to side. Any idea what causes this? It seems to be doing well otherwise in its bushel basket filled with potting soil.
A: Rolled tomato leaves can be caused by several things. Many serious tomato diseases, including curly top, mosaic, fusarium and herbicide injury, begin with rolling leaves. But if your plants are green and no other symptoms appear, it’s probably plain old “tomato leaf roll”. It’s a temporary disorder resulting from excessively wet soil, especially after heavy rains, or bright sunshine on young plants. It doesn’t affect the plant’s growth. A normal crop of fruit is usually produced. The rolling typically disappears in a few days when the soil dries out. ‘Big Boy’, ‘Floramerica’ and ‘Beefsteak’ are affected most often.