Plant Disorder: Oedema
Author(s) M. F. Heimann, G. L. Worf.
Oedema (edema) is a common problem that affects many greenhouse crops and house plants; occasionally it also occurs outside. Geranium, particularly ivy geranium and certain cultivars such as Irene, are the most susceptible. Jade, palm, cactus, fern, ivy, pepperomia, and tomato are among other groups susceptible to oedema, which can be a problem for both professional and amateur growers.
Find out more about oedema, including how to prevent and control this common disorder, by reading this helpful fact sheet (2 pages; Revised in 1996).