Hardy geraniums occur naturally in every country of the world, excluding Antarctica. Perennial forms, which make up the bulk of the genus, have a lengthy flowering season evident here from May to October. There are species adapted to sun, shade, and a wide variety of soil conditions. Hardy geraniums are usually clumping plants, but their trailing stems make great groundcovers. A handful of them acquire colorful fall foliage too. They are favored Midwest landscape plants with multiple attributes. The Garden has the largest number of Geranium taxa in the United States and acquires more every year. The collection started in 2007 and consists of 160 identified/known taxa (including 118 cultivars).