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DESCRIPTION: Black Knight Delphinium features bold spikes of royal blue flowers with indigo eyes rising above the foliage from early to mid summer. The flowers are excellent for cutting. Its deeply cut lobed leaves remain forest green in colour throughout the season.
BOTANICAL NAME: Delphinium elatum 'Black Knight'
OTHER NAMES: Black Knight Larkspur
AVERAGE HEIGHT: 175 cm
AVERAGE SPREAD: 60 cm
SUN EXPOSURE: Full sun
FLOWER COLOUR: Midnight-violet
FLOWERING TIME: Summer
FOLIAGE COLOUR: Deep green
COLD HARDINESS: Zone 3 ( Should survive up to -39.9° Celsius )
WATER NEEDS: Average
OTHER FEATURES: Attracts Birds, Bees & Butterflies, Border, Cut Flower
Black Knight Delphinium 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;
Black Knight Delphinium is recommended for the following landscape applications;
Planting & Growing
Black Knight Delphinium will grow to be about 3 feet tall at maturity extending to 5 feet tall with the flowers, with a spread of 18 inches. When grown in masses or used as a bedding plant, individual plants should be spaced approximately 12 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.
Black Knight Delphinium 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. Be aware that in our climate, most plants cannot be expected to survive the winter if left in containers outdoors, and this plant is no exception.
*We must be contacted within 7 days of delivery and plants must be taken care of, unplanted and watered until we can pick them up.
**Cedars & Perennials only come with an in-season warranty only. Warranty does not apply to frost damage, hail damage, wind damage or any other acts of mother nature. Plants must be properly planted, properly watered and cared for. Warranty only applies to items purchased at full price or to a maximum discount of 10% unless otherwise specified.