Why does my chard do this?
Both my chard and spinach get these wilted, discolored edges on just SOME of the leaves, not all, nor does it happen to all the plants or to any others, like lettuce. Does anyone know what causes it? Otherwise, they seem to be healthy and happy. I plan to get a soil test, but could it be over- or underwatering? Lack of fertilizers, maybe? It doesn't appear to be under attack by bugs.
Thanks for any help.