Leaf Spots Not Always From Pests
Gardeners are often quick to blame insects or infectious disease when their plants develop leaf spots. But, in many cases — especially with houseplants — those spots may be due to environment and cultural practices. House plants that experience extremes in soil moisture often develop spots on their leaves, called “oedema” (sometimes spelled “edema”). The spots may first appear as a blister or raised spot, particularly on the undersides of leaves, but may occur on […]