Larkspur Guardian White

Delphinium guardian white

Photo: Larkspur Guardian White

[Guardian White Larkspur (Delphinium 'Guardian White') at Connon Nurseries CBV]

Delphinium 'Guardian White' flowers

(Photo courtesy of V. Trattar)

Plant Height:  24 inches

Flower Height:  4 feet

Spacing:  18 inches

Sunlight:   [full sun]  

Hardiness Zone:  2a

Group/Class:  Guardian Mix Series


Magnificent display of double white flowers on towering spikes with constrasting chartreuse centers; good vertical form, dense flower spikes and strong stems

Ornamental Features

Guardian White Larkspur features bold spikes of white flowers with chartreuse eyes rising above the foliage from early to mid summer. The flowers are excellent for cutting. Its deeply cut lobed leaves remain dark green in colour throughout the season. The fruit is not ornamentally significant.

Landscape Attributes

Guardian White Larkspur is an herbaceous perennial with a rigidly upright and towering form. Its relatively fine texture sets it apart from other garden plants with less refined foliage.

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;


Guardian White Larkspur is recommended for the following landscape applications;

Vertical Accent
Mass Planting
General Garden Use
Container Planting

Planting & Growing

Guardian White Larkspur will grow to be about 24 inches tall at maturity extending to 4 feet 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 18 inches apart. It tends to be leggy, with a typical clearance of 1 foot from the ground, and should be underplanted with lower-growing perennials. The flower stalks can be weak and so it may require staking in exposed sites or excessively rich soils. It grows at a medium rate, and under ideal conditions can be expected to live for approximately 10 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 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.

Guardian White Larkspur is a fine choice for the garden, but it is also a good selection for planting in outdoor pots and containers. With its upright habit of growth, it is best suited for use as a 'thriller' in the 'spiller-thriller-filler' container combination; plant it near the center of the pot, surrounded by smaller plants and those that spill over the edges. 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]
[Articulation]    [Massing]    [Garden]    [Container]  


24 - 52 cm
Soil type
Full sun
Moist but well-drained