Plant breeders have developed new geranium varieties that tolerate the hot days and nights of summers in the Midwest. As a result, geraniums are making a comeback as permanent residents of summer gardens in Iowa.
Buck, Griffith J.
"Geraniums Make a Comeback,"
Iowa Farm Science: Vol. 17
, Article 2.
Available at: https://lib.dr.iastate.edu/farmscience/vol17/iss9/2