Fungicide sprays, when environmental conditions are favorable, will help reduce levels of this disease. Rust, root rots, stem rot, and leaf spots are other diseases known to infect geraniums. Insects that frequently attack geraniums include aphids, cabbage loopers, and fall cankerworms. The four-lined plant bug, scale, and slugs can also cause damage. Properly identify the insect pest and control with the recommended insecticide.
Geraniums are one of the most popular annual plants grown by gardeners today.
Proper selection, location, and care will keep them blooming and healthy all season long. Iowa State University , Ames, Iowa. This information subject to a usage policy .