True Geraniums

The term geranium is confusing. The first geranium most gardeners encounter is not a geranium at all, but Pelargonium, a relative of the perennial geranium. True or hardy or perennial geraniums belong to the genus Geranium. You will sometimes see them referred to as cranesbill geraniums, because their seed pods do somewhat resemble a crane’s bill. The foliage is often toothed and remains attractive. The flowers float on top of the plant, in shades of white, pink, magenta, purples and blues.There is a great deal of variety in the geranium genus, but most of the commonly grown varieties are low growing, dense carpet-like plants. The leaves may be rounded, but more often they are serrated or lobed and quite attractive. T

The flowers are small (1") and cupped shaped, attracting plenty of butterflies and bees. Thin stems hold the flowers above the foliage. And they're deer resistant, too.

See more on the variety of true geraniums in the photo gallery Growing Hardy Geraniums.

Geraniums require little care, once established.

They prefer full sun and a well-drained, moderately rich soil. They can handle partial shade, but become more prone to mildew if kept damp.

Geraniums are not particular about soil pH, but a neutral to slightly acid soil is ideal. (5.8 - 7.0)

Maintenance: The plants can get a bit scraggly after blooming and deadheading is difficult with so many wispy stems. Shearing the plants back to basal growth will improve its look and encourage reblooming. The plants fill back in within weeks. The exception is Geranium macrorrhizum, which is easily deadheaded and needs no shearing.

Most species of Geranium live longer if divided every 3-5 years. You can divide more frequently, so keep them from spreading. But once you see the center dying out, it is definitely time to divide.

Problems: Slugs may attack young plants. Mildew and rust can infest foliage, especially in partial shade and/or humid climates. Shearing back and disposing of the infected leaves will help.