Crambe maritima

Crambe maritima

Sea kale

A table displaying which months are best to sow, plant and harvest.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Flowers
Flowers

Plant does not flower in January

Plant does not flower in February

Plant does not flower in March

Plant does not flower in April

Plant does flower in May

Plant does flower in June

Plant does flower in July

Plant does not flower in August

Plant does not flower in September

Plant does not flower in October

Plant does not flower in November

Plant does not flower in December

  • Botanical name: Crambe maritima
  • Common name: Sea kale
  • Family: Brassicaceae
  • Plant Type: Perennial
Flower colour:

White

Foliage colour:

Blue​/​Green

On top of being a robust and lovely plant for the garden, sea kale (Crambe maritima) is edible, too. Glaucous mounds of this herbaceous perennial can often be spotted growing on shingle beaches.

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In early summer clusters of white honey-scented flowers appear that attract a range of pollinating insects. The very young leaves and stems can be eaten raw or steamed, but the best flavour is thought to come from plants that have been forced, as you would with rhubarb. Find out how to grow sea kale for more advice. It’s also a great addition to gravel and coastal gardens, where it’ll combine beautifully with plants like sea thrift and kniphofia.

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For best results, grow Crambe maritima in full sun or partial shade in deep, fertile, well-drained soil. Cut back in autumn.

How to grow Crambe maritima

  • Plant size

    75cm height

    60cm spread

  • Aspect

    South facing, east facing, west facing

  • Position in border

    Front

  • Sun exposure: Dappled shade, full sun, partial shade
  • Hardiness: Hardy
  • Soil type: Clay / heavy / moist / well drained / light / sandy

Plant calendar

A table displaying which months are best to sow, plant and harvest.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Sow
Sow

Do not Sow in January

Do not Sow in February

Do Sow in March

Do Sow in April

Do Sow in May

Do not Sow in June

Do not Sow in July

Do not Sow in August

Do Sow in September

Do Sow in October

Do Sow in November

Do not Sow in December

Plant
Plant

Do not Plant in January

Do not Plant in February

Do Plant in March

Do Plant in April

Do Plant in May

Do not Plant in June

Do not Plant in July

Do not Plant in August

Do Plant in September

Do Plant in October

Do Plant in November

Do not Plant in December

Flowers
Flowers

Plant does not flower in January

Plant does not flower in February

Plant does not flower in March

Plant does not flower in April

Plant does flower in May

Plant does flower in June

Plant does flower in July

Plant does not flower in August

Plant does not flower in September

Plant does not flower in October

Plant does not flower in November

Plant does not flower in December

Divide
Divide

Do not Divide in January

Do not Divide in February

Do Divide in March

Do not Divide in April

Do not Divide in May

Do not Divide in June

Do not Divide in July

Do not Divide in August

Do not Divide in September

Do not Divide in October

Do not Divide in November

Do not Divide in December

Take cuttings
Take cuttings

Do Take cuttings in January

Do not Take cuttings in February

Do not Take cuttings in March

Do not Take cuttings in April

Do not Take cuttings in May

Do not Take cuttings in June

Do not Take cuttings in July

Do not Take cuttings in August

Do not Take cuttings in September

Do not Take cuttings in October

Do not Take cuttings in November

Do Take cuttings in December

Harvest
Harvest

Do not Harvest in January

Do not Harvest in February

Do Harvest in March

Do Harvest in April

Do not Harvest in May

Do not Harvest in June

Do not Harvest in July

Do not Harvest in August

Do not Harvest in September

Do not Harvest in October

Do not Harvest in November

Do not Harvest in December

Crambe maritima and wildlife

Crambe maritima is known for attracting bees, beneficial insects and other pollinators. It has nectar/pollen rich flowers.

Attractive to Bees

Attractive to Beneficial insects

Does not attract Birds

Does not attract Butterflies​/​Moths

Attractive to Other pollinators

Is Crambe maritima poisonous?

Crambe maritima has no toxic effects reported.

No reported toxicity to:

No reported toxicity to Birds

No reported toxicity to Cats

No reported toxicity to Dogs

No reported toxicity to Horses

No reported toxicity to Livestock

No reported toxicity to People

Plants that go well with Crambe maritima