Summary: Impatiens downy mildew is a growing problem in gardens across America. Defoliation and flower dropping are two signs your plants are infected. Impatiens are an enormously popular bedding plant that love the shade, though there are sun tolerant varieties. What this sweet-looking plant can't stand is too much heat and humidity. That potent combination leaves the plant open to downy mildew. When the mildew first strikes, leaves curl under and turn light in color, blossoms drop and a fluffy white
