Black Knight Canna foliage
(Photo courtesy of NetPS Plant Finder)
Plant Height: 4 feet
Flower Height: 6 feet
Spread: 24 inches
Hardiness Zone: 8b
Black Knight Canna features bold spikes of red orchid-like flowers at the ends of the stems from early summer to late fall. Its attractive enormous glossy pointy leaves remain dark red in color with prominent dark green stripes and tinges of burgundy throughout the season. The fruit is not ornamentally significant. The dark red stems can be quite attractive.
Black Knight Canna is an herbaceous perennial with a rigidly upright and towering form. Its wonderfully bold, coarse texture can be very effective in a balanced garden composition.
This is a high maintenance plant that will require regular care and upkeep, and should be cut back in late fall in preparation for winter. It is a good choice for attracting hummingbirds to your yard. Gardeners should be aware of the following characteristic(s) that may warrant special consideration;
Black Knight Canna is recommended for the following landscape applications;
- Mass Planting
- General Garden Use
- Container Planting
- Bog Gardens
Planting & Growing
Black Knight Canna will grow to be about 4 feet tall at maturity extending to 6 feet tall with the flowers, with a spread of 24 inches. It has a low canopy with a typical clearance of 1 foot from the ground. It grows at a fast 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 moist to wet soil, and will even tolerate some standing water. It is not particular as to soil type or pH. It is highly tolerant of urban pollution and will even thrive in inner city environments. Consider applying a thick mulch around the root zone in winter to protect it in exposed locations or colder microclimates. 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 Canna 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.