Pelargoniums are almost all evergreen, perennial plants of South African origin. They are commonly called geraniums because of their flowers similarity to that genus, but are actually a genus of their own in the same family.
These are frost tender plants which are treated as annuals in northern beds but can flower year round in the south. They do not do well in extreme heat and humidity.
Does best in a soil with a high clay content and not too rich in nitrogen which promotes all leaf growth. A high potassium fertilizer, which you can give every 7 to 14 days throughout the summer will promote flowering.
Most prefer full sun, except where that would mean extreme heat. Then provide some shade during the day.
Propagate from softwood cuttings from spring to fall.