"People sometimes confuse scale for a disease," says Annette Gutierrez, co-owner of Potted in Los Angeles, California. "It's actually a pest." What we know as scale is caused by different tiny insects ...

Many people have a potted citrus plant or two that they keep indoors during the winter and move outdoors for the summer. It may be one of those dwarf trees that produce full-sized fruit. Or it could ...