Crambe cordifolia
Colewort
Family |
Brassicaceae |
Genus |
Crambe |
Species |
cordifolia |
Category |
Perennials |
Pronunciation |
USDA Hardiness Zone |
7b - 8a |
Canadian Hardiness Zone |
7b |
RHS Hardiness Zone |
H5 (Observed growing well in H7 in a protected location) |
Temperature (°C) |
-15 to -10 |
Temperature (°F) |
5 - 14 |
Height |
1.2-1.8 m |
Spread |
60-90 cm |
Landscape |
This architectural plant can be used in the mid section of the border or in the back, either as a focal plant or in larger grouping if space is available. |
Cultivation |
It is easy to grow in any soil, in light shade or sun. |
Growth |
Medium |
Habitat |
Caucasus region, Afganistan and Iran. |
Leaf Description |
The heart-shaped leaves are large, 50 cm across and coarse. They form a massive, dark green rosette. |
Flower Description |
In the early summer, 2 - 3 tall flowering stalks appear bearing numerous white flowers. When in flower, Crambe cordifolia looks like a spectacular white cloud suspended above the leaves. |
Propagation |
From seed; direct sow outdoors in autumn or winter sow in containers in a cold frame or unheated greenhouse. Pencil thick root cuttings in early spring also work. |