What is happening to the leaves on my tomato plants? Some are
growing perfectly fine and full, others are
growing like this: dark green/purple and withered. It started off as just one branch and now it is multiple. Although, like I said, it is not affecting the plant as a whole. Some new leaf sets are
growing perfectly normal. Even the withered discolored branches of leaves are still
growing tomatoes. What could be causing this? Should I remove branches of leaves that look like this, or should I keep them on plant since they are still
growing tomatoes?