Although most geraniums (Pelargoniums) are immune to spider mites, the ivy geranium is susceptible to injury from spider mites during warmer weather conditions. Spider mites suck the sap from plant leaves and stems, which causes leaves to yellow and eventually drop.
About this Author
Amy Deemer began her writing career in 1992. She began writing online content in 2009 and writes primarily for Answerbag and Garden Guides. Deemer enjoys researching and writing about flowers, plants and gardening. Deemer has an Associate of Arts in liberal studies from Westmoreland Community College.