Dear Jessica: All my perennials have black spots or holes in their leaves. It happened last year, too. I thought it was from the mulch I put down, so this year I used peat moss instead. If my soil has bugs doing this, is there any hope? Or do I have to dig this up and start over?
_ Dorothy Cesarski
Dear Dorothy: Black or brown spots on leaves usually are caused by a fungal or bacterial infection. Either way, the best defense is a good offense: good sanitation.
