Got spots? Yellow, curled, prematurely dying leaves? If the plant is otherwise healthy looking, the culprit is probably leaf spot. Most leaf diseases are caused by fungi, although bacteria and nematodes can create foliar problems too.
Earlier this spring, conditions were ideal for fungal diseases to get a foothold in many gardens. First it was unusally warm, then turned quickly colder with temperatures remaining below normal for several weeks, followed by a period of no rain. Such conditions are optimal for leaf spot.
Here’s what to know and how to control this common, widespread nuisance.