Colewort, Flowering Kale, Giant Kale, Giant Gypsophila

Crambecordifolia

Family
Brassicaceae (brass-ih-KAY-see-ee)
Genus
Crambe (KRAM-bee)
Species
cordifolia (kor-di-FOH-lee-uh)
Synonym
Sun Exposure
Full Sun
Foliage
Herbaceous
Height
4-6 ft. (1.2-1.8 m)
Spacing
24-36 in. (60-90 cm)
Hardiness
USDA Zone 5a: to -28.8 °C (-20 °F)
USDA Zone 5b: to -26.1 °C (-15 °F)
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
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)
Danger
N/A
Bloom Color
Cream/Tan
Bloom Time
Late Spring/Early Summer
Mid Summer
Other Details
Category
Perennials
Water Requirements
Average Water Needs; Water regularly; do not overwater
Foliage Color
Dark/Black
Where to Grow
Grow outdoors year-round in hardiness zone
Bloom Characteristics
This plant is attractive to bees, butterflies and/or birds
Flowers are fragrant
Bloom Size
Other details
Soil pH requirements
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
7.9 to 8.5 (alkaline)
Patent Information
Non-patented
Propagation Methods
From seed; direct sow outdoors in fall
From seed; winter sow in vented containers, coldframe or unheated greenhouse
Seed Collecting
Allow seedheads to dry on plants; remove and collect seeds
Properly cleaned, seed can be successfully stored
Regional

This plant is said to grow outdoors in the following regions:

Kiowa, Colorado

Saint Petersburg, Florida

Denison, Iowa

Woden, Iowa

Portland, Oregon

Doylestown, Pennsylvania

Gibsonia, Pennsylvania

Dallas, Texas

Lexington, Virginia

Olympia, Washington

Seattle, Washington

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Gardener's Notes:

6
positives
4
neutrals
1
negative
Sort By:
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C
ROSLINDALE, MA | March 2015 | neutral

These are enormous plants with dramatic foliage, best used as a focal point in a large garden.

The huge inflorescence usua...Read More

C
Doylestown, PA | March 2015 | positive

My plant is at least 8 yrs old. It bloomed the 2nd and 3rd year but after that all I get is big leaves. Full sun, zone 6. Leaves look hea...Read More

N
| August 2013 | positive

My daughter has been growing this successfully for years, grows wonderfully big on the east side of her house in sandy soil, low moisture...Read More

C
Saint Petersburg, FL (Zone 10a) | November 2009 | positive

I recently purchased one from our local nursery because we have a guinea pig we would like to feed. We've grown this back in '05 on the n...Read More

A
Portland, OR | June 2009 | positive

My plant in Portland, Oregon has become four plants (I call it the creeping crambe), with eastern exposure only. They bloom beautifully w...Read More

W
Olympia, WA | April 2008 | positive

I see this is listed as to be propagated by seed, but I would like to add that it is easily propagated by root stock division. I had to ...Read More

S
S
(Zone 8b) | April 2005 | neutral

I 've wintersowed seeds january 2004 and planted them out that spring. End of april a stem with flowerbuds has emerged.
I hope it ...Read More

P
| July 2004 | negative

I cant get crambe cordifolia to bloom for me. It is planted in a zone 4b in a heavy clay, dry soil. I have replanted some of it in a li...Read More

J
Scottville, MI (Zone 4b) | June 2004 | neutral

Zone 4b, I've had it 3 years, and it has two leaves about 4" across... I keep waiting for it to get big... that's why I bought it. Some ...Read More

T
(Zone 4a) | June 2003 | positive

It is interesting that all the literature on Crambe cordifolia list it as hardy to Zone 5, yet my Crambe has been thriving in Zone...Read More

T
Kearney, NE (Zone 5a) | August 2001 | neutral

This is a great plant for back of the border. The foliage is huge with wavy fleshy leaves about 3' long. The flowers are creamy-white a...Read More

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