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A picture of a Greater Sea Kale

Greater Sea Kale

Crambe cordifolia

Also known as

Colewort, Flowering Sea Kale, Heart-Leaved Colewort, Crambe, Heartleaf

Photo by CandideUK (All rights reserved)

Full Sun
Advanced care
Light watering
Frost Hardy


RHS hardiness


Minimum temperature

Expected size









  • spring
  • summer
  • autumn
  • winter

This plant has no fragrance

More images of Greater Sea Kale

A photo of Greater Sea Kale
A photo of Greater Sea Kale
A photo of Greater Sea Kale
A photo of Greater Sea Kale
A photo of Greater Sea Kale

Greater Sea Kale Overview

Crambe cordifolia is a clump-forming perennial mound. It will produce very large glossy dark green crenulate, toothed leaves which are followed by profuse clusters of tiny white flowers in late spring. The flower stems grow to 1.5m tall making this a garden architectural attraction. It has very deep roots which will produce many offsets. Also known as Flowering Sea Kale or Greater Sea Kale, this herbaceous hardy plant grows best full-sun position with fertile, well-drained soil, it will, however, tolerate poor soil or partial shade. This species has earned a Royal Horticultural Society (RHS) Award of Garden Merit. It is also part of the RHS “Plants for Pollinators” initiative to showcase plants that support pollinator populations by providing ample nectar and pollen. An excellent choice for encouraging pollinating insect wildlife into your garden!

Common problems with Greater Sea Kale

How to harvest Greater Sea Kale

Flowers can be cut for floral arrangements as required.

How to propagate Greater Sea Kale


Divide the roots.


Seeds in spring or autumn.

Special features of Greater Sea Kale

Attractive flowers

Attracts useful insects

Flies, hoverflies

Other uses of Greater Sea Kale

Border, ornamental Summer interest. Wildlife-friendly, Cut-flower patch. This plant suits being included in planting schemes for sheltered locations with south, east or west-facing aspects


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