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PlantFiles: Canna Lily
Canna x generalis 'Black Knight'

Family: Cannaceae (kan-AY-see-ee) (Info)
Genus: Canna (KAN-uh) (Info)
Species: x generalis (jen-er-RAY-liss) (Info)
Cultivar: Black Knight

» View all varieties of Cannas

4 vendors have this plant for sale.

27 members have or want this plant for trade.

Tropicals and Tender Perennials

4-6 ft. (1.2-1.8 m)

24-36 in. (60-90 cm)

USDA Zone 7a: to -17.7 C (0 F)
USDA Zone 7b: to -14.9 C (5 F)
USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)
USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)
USDA Zone 10a: to -1.1 C (30 F)
USDA Zone 10b: to 1.7 C (35 F)
USDA Zone 11: above 4.5 C (40 F)

Sun Exposure:
Full Sun

Bloom Color:
Scarlet (Dark Red)

Bloom Time:
Mid Summer
Late Summer/Early Fall
Mid Fall

Grown for foliage

Other details:
Requires consistently moist soil; do not let dry out between waterings
This plant is resistant to deer
Suitable for growing in containers

Soil pH requirements:
6.1 to 6.5 (mildly acidic)

Patent Information:
Unknown - Tell us

Propagation Methods:
By dividing rhizomes, tubers, corms or bulbs (including offsets)

Seed Collecting:
Unknown - Tell us

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By Abutilon
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By PotEmUp
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There are a total of 12 photos.
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8 positives
1 neutral
No negatives

Gardeners' Notes:

Positive debylutz On Jun 16, 2014, debylutz from San Diego, CA (Zone 10a) wrote:

Wow! I could not believe how beautiful and healthy the 5-gallon Black Knight cannas were at Sperling Nursery in Calabasas CA. I bought two at $30 each to use in one of my landscape designs. The cannas were well cared-for and almost pristine in appearance with 5 to 8 stalks in each pot. Total bargain for plants so beautiful and robust :)

Positive kivorykay On Feb 5, 2013, kivorykay from Brooklyn, NY wrote:

I don't believe I could get rid of this beauty if I intended to. The first year, I lost track of them (about a dozen) in fall because I'd inadvertently covered them with about 2" of leaves & soil. They came up beautifully. Last winter I pulled them out of the ground (they were soaked and I worried about winter rot) but didn't get them inside. They froze and dried into wizened little dead things.

Luckily, I overlooked destroying one lonely rhizome, which came up in May and propagated wildly. Six or seven bloomed in summer (2012) and by Oct., I counted 29 ready to be separated.

I'm in Zone 6, but have a Zone 7 microclimate. The canna are watered less than most of the garden but are growing behind a decaying stump that may provide additional moisture. I (generally) leave them in the ground all winter, mulch-less, and transplant them throughout their growing period. If they are too tall, the tips of older leaves will turn brown so I try to transplant them before too many leaves have appeared.

Neutral annsg On Jun 5, 2011, annsg from Apollo Beach, FL wrote:

Very successful here in 9b, cannas will just keep coming up and coming up. Love water but seem to be pretty drought/heat resistant when established. Ours looked best in spring and early summer...late summer brought about some kind of caterpillar that turned the beautiful foliage into nothing but ragged pieces every year. They can get a little top-heavy when the stalks get pretty tall; many of mine bent and collapsed. Cannas are great if you're looking for something you can basically ignore and if a bit of messiness doesn't bother you, but unattractive spent stalks and many brown, spent leaves combined with the caterpillar problems caused us to remove ours.

Positive pamichen On Apr 25, 2010, pamichen from Huntington Woods, MI wrote:

I have good luck with this in my garden pond. I put a couple of cinder blocks beneath it and grow it with the bottom of the pot (bottom 2 inches) in the water. Plant does great-lots of leaves and flowers and the red and dark greenish black colors are unusual in a pond. I dig it and over-winter it indoors packed in peat. Works well. All-around good plant.

Positive SusanKC On Mar 15, 2010, SusanKC from Shawnee Mission, KS (Zone 6a) wrote:

Love this canna. We mass plant this every year to get more privacy for our patio. Very easy to care for. We drop it in a hole, cover, put a soaker hose over it and by midsummer it is in bloom. Our cannas are well over 7 feet by the end of the summer. Hummingbirds love the blossoms.

Positive wallaby1 On Mar 3, 2006, wallaby1 from Lincoln
United Kingdom (Zone 8a) wrote:

I have had this plant for a few years now, and it is a very robust grower, remains healthy, but does need to be divided every year to encourage strong new growth. I keep it in deep plastic 10" pots, and when it begins to grow in Spring it pushes the side of the pots out, that is the time to divide.

The leaves are very large, I measured one of the new leaves to 2 feet long, they start off a dark, plum purple with deep green striping, maturing to a more mellow colour. All the pictures I see where it is offered are deep red, in reality they are a rich orange with a red flush, but this may alter according to soils and sun levels.

I grow it in a mixture of leafy compost with gritty river soil and Moss Peat, adding a little slow release fertiliser will provide it with extra food, I also have given it about 3 tomato food liquid feeds in the season. For a little care it will reward you well. It is overwintered in a cold greenhouse and has come through quite hard frosts to approx -9C so far, or 16F.

This variety can be grown in the ground with a good mulch, I haven't tried it yet but intend to do this year. It should be kept moist at all times, even through winter but not too wet.

Positive Pagancat On Mar 3, 2006, Pagancat from (Sheryl) Gainesboro, TN (Zone 6b) wrote:

My first canna bloom this year (this is a very warm winter). Planted it mid fall - large, scarlet bloom, very nice. My leaves are not so dark as others describe, more a purplish green, but a nice contrast to the blooms.

I don't have a pond but it survives on the graywater from my washing machine.

Positive CannaGrwr On Nov 20, 2003, CannaGrwr wrote:

I have this very dark flowered canna 'Black Night', a very good red color! next to my very white flowered one 'New White'! right now both in full bloom towering over my fence in late November!. I love to show them both off. Hopefully they will bloom all winter long here in Southern California!. One year canna 'Black Night' did!.

Positive Abutilon On Sep 28, 2002, Abutilon from Coal Center, PA (Zone 6a) wrote:

My first canna and still one of my very favourites. Huge black red bloom over deep black green leaves. Medium height.
Excellent canna (o:


This plant has been said to grow in the following regions:

Phoenix, Arizona
Fresno, California
Mission Viejo, California
Redondo Beach, California
San Diego, California
San Jose, California
Apollo Beach, Florida
Brandon, Florida
Zephyrhills, Florida
Hinesville, Georgia
Jesup, Georgia
Roopville, Georgia
Boise, Idaho
Godfrey, Illinois
Shawnee Mission, Kansas
Hanson, Kentucky
Louisville, Kentucky
Deridder, Louisiana
Detroit, Michigan
Redford, Michigan
Waynesboro, Mississippi
Lees Summit, Missouri
Brooklyn, New York
Fletcher, North Carolina
Hendersonville, North Carolina
Cincinnati, Ohio
Newalla, Oklahoma
Salem, Oregon
Coal Center, Pennsylvania
Myrtle Beach, South Carolina
Newberry, South Carolina
Allen, Texas
Austin, Texas
Camp Wood, Texas
Fort Worth, Texas
Premont, Texas
San Antonio, Texas
Richmond, Virginia
South Boston, Virginia

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