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Diamonds Blue Delphinium

Delphinium grandiflorum 'Diamonds Blue'

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Diamonds Blue Delphinium (Delphinium grandiflorum 'Diamonds Blue') at Ashcombe Farm & Greenhouses

Delphinium grandiflorum 'Diamonds Blue' flowers

Delphinium grandiflorum 'Diamonds Blue' flowers

(Photo courtesy of NetPS Plant Finder)

Height:  20 inches

Spacing:  10 inches

Sunlight:  full sun 

Hardiness Zone:  2a

Other Names:  Dwarf Larkspur

Description:

Magnificent variety displays electric blue flowers on a mounded plant; a perfect selection for smaller places in the garden, put in containers and along borders

Ornamental Features

Diamonds Blue Delphinium has masses of beautiful panicles of blue flowers with violet overtones at the ends of the stems from early summer to early fall, which are most effective when planted in groupings. The flowers are excellent for cutting. Its crinkled ferny compound leaves remain dark green in color throughout the season. The fruit is not ornamentally significant.

Landscape Attributes

Diamonds Blue Delphinium is an herbaceous perennial with a mounded form. It brings an extremely fine and delicate texture to the garden composition and should be used to full effect.

This plant will require occasional maintenance and upkeep, and should be cut back in late fall in preparation for winter. It is a good choice for attracting bees, butterflies and hummingbirds to your yard. Gardeners should be aware of the following characteristic(s) that may warrant special consideration;

  • Insects
  • Disease
  • Self-Seeding

Diamonds Blue Delphinium is recommended for the following landscape applications;

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

Planting & Growing

Diamonds Blue Delphinium will grow to be about 16 inches tall at maturity, with a spread of 12 inches. When grown in masses or used as a bedding plant, individual plants should be spaced approximately 10 inches apart. It grows at a medium rate, and under ideal conditions can be expected to live for approximately 3 years.

This plant should only be grown in full sunlight. It prefers to grow in average to moist conditions, and shouldn't be allowed to dry out. It is not particular as to soil type or pH. It is somewhat tolerant of urban pollution. This is a selected variety of a species not originally from North America, and parts of it are known to be toxic to humans and animals, so care should be exercised in planting it around children and pets. 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.

Diamonds Blue Delphinium is a fine choice for the garden, but it is also a good selection for planting in outdoor pots and containers. It can be used either as 'filler' or as a 'thriller' in the 'spiller-thriller-filler' container combination, depending on the height and form of the other plants used in the container planting. Note that when growing plants in outdoor containers and baskets, they may require more frequent waterings than they would in the yard or garden.

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