Plant Finder

perennial

Johnson's Blue Cranesbill

Geranium 'Johnson's Blue'

Add To My Wish List

 
Johnson's Blue Cranesbill (Geranium 'Johnson's Blue') at Minor's Garden Center

Johnson's Blue Cranesbill flowers

Johnson's Blue Cranesbill flowers

(Photo courtesy of NetPS Plant Finder)

Johnson's Blue Cranesbill (Geranium 'Johnson's Blue') at Minor's Garden Center

Johnson's Blue Cranesbill in bloom

Johnson's Blue Cranesbill in bloom

(Photo courtesy of NetPS Plant Finder)

Plant Height:  12 inches

Flower Height:  18 inches

Spacing:  20 inches

Sunlight:  full sun  partial shade 

Hardiness Zone:  4a

Other Names:  Hardy Geranium

Brand:  RADTKE

Ornamental Features

Johnson's Blue Cranesbill has masses of beautiful blue cup-shaped flowers with white eyes at the ends of the stems from late spring to mid summer, which are most effective when planted in groupings. Its deeply cut lobed palmate leaves are dark green in color. As an added bonus, the foliage turns a gorgeous red in the fall.

Landscape Attributes

Johnson's Blue Cranesbill is an herbaceous perennial with a mounded form. Its relatively fine texture sets it apart from other garden plants with less refined foliage.

This is a relatively low maintenance plant, and should only be pruned after flowering to avoid removing any of the current season's flowers. Deer don't particularly care for this plant and will usually leave it alone in favor of tastier treats. It has no significant negative characteristics.

Johnson's Blue Cranesbill is recommended for the following landscape applications;

  • Mass Planting
  • Rock/Alpine Gardens
  • Border Edging
  • General Garden Use
  • Container Planting

Planting & Growing

Johnson's Blue Cranesbill will grow to be about 12 inches tall at maturity extending to 18 inches tall with the flowers, with a spread of 24 inches. When grown in masses or used as a bedding plant, individual plants should be spaced approximately 20 inches apart. Its foliage tends to remain dense right to the ground, not requiring facer plants in front. It grows at a medium rate, and under ideal conditions can be expected to live for approximately 10 years. As an herbaceous perennial, this plant will usually die back to the crown each winter, and will regrow from the base each spring. Be careful not to disturb the crown in late winter when it may not be readily seen!

This plant does best in full sun to partial shade. It is very adaptable to both dry and moist locations, and should do just fine under typical garden conditions. It is not particular as to soil type or pH. It is somewhat tolerant of urban pollution. This particular variety is an interspecific hybrid. It can be propagated by division; however, as a cultivated variety, be aware that it may be subject to certain restrictions or prohibitions on propagation.

Johnson's Blue Cranesbill is a fine choice for the garden, but it is also a good selection for planting in outdoor pots and containers. It is often used as a 'filler' in the 'spiller-thriller-filler' container combination, providing a mass of flowers against which the thriller plants stand out. Note that when growing plants in outdoor containers and baskets, they may require more frequent waterings than they would in the yard or garden.

Sizes Available:

4.5" Cont. $7.99, #1 Cont. $13.99

 
 
Hardiness Zone Plant Height Minimum Sunlight
Characteristics
Massing  Rock  Edging  Garden  Container 
Applications
Flowers  Fall Color  Texture 
Ornamental Features