We had a very wet season this spring. I have my plants in a raised bed. It rained so much that water was standing in the bed like a lake. It drained but then more rain ,more standing water. The bed drains well under normal conditions. Anyway I am seeing brown and yellow spots on the leaves now. The plants are still small. My question is should I just replace the plants or treat the existing ones. If its a disease I don't want it to spread. Anyone have any recommendations.