Genus: Cranesbill

Geranium

Photo/Illustration: 
Michelle Gervais
Cranesbill (Geranium)
jer-AY-nee-um
Geraniaceae
These indispensable perennials offer distinctive leaves and simple flowers in white and shades of blue and pink. There are plants for almost any climate, in a range of sizes from 5-inch buns to 5-foot giants. In an era of highly hybridized, flamboyant plants and doubled flowers, hardy geraniums are modest and restful to the eye. They are versatile perennials that thrive everywhere.
Noteworthy characteristics:  Geraniums occur as wildflowers widely—around the world from alpine slopes to low grasslands and woodlands—so there’s likely to be a geranium for any garden from USDA Hardiness Zone 1 (below -50°F) to the mild-winter areas of California and Florida. With the simple charm of wildflowers, they fill niches in woodland settings, perennial borders and rock gardens and can visually link shrubs to more formal and brightly colored perennials.
Care:  The majority need only reasonably fertile, reasonably moist soil. A few prefer gritty, well-drained soil.
Propagation: 

Hardy geraniums are easy to propagate. Most can be started from seeds in the spring or divided at any time during the growing season.

Problems: 

Most are not troubled by pests and diseases.

Species, varieties and clutivars for genus Geranium

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Geranium
Geranium 'Ann Folkard'
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Hardy geranium
Geranium 'Rozanne'
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Geranium
Geranium cinereum ‘Ballerina’
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Cranesbill
Geranium himalayense
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Bigroot geranium
Geranium macrorrhizum 'Bevan's Variety'
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Spotted geranium
Geranium maculatum
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Spotted geranium
Geranium maculatum 'Elizabeth Ann'
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Geranium nodosum
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'Dark Reiter' geranium
Geranium pratense 'Dark Reiter'
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Meadow cranesbill
Geranium pratense 'Midnight Reiter'
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Cranesbill
Geranium psilostemon
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Bloody cranesbill
Geranium sanguineum
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Bloody cranesbill
Geranium sanguineum var. striatum
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Cranesbill
Geranium  × oxonianum 'Wargrave Pink'
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Cranesbill
Geranium ‘Johnson's Blue’