Centaurea Seeds 'Great Knapweed'

Centaurea scabiosa

A native British wildflower that thrives on neglect, Centaurea scabiosa (great knapweed) grows even in poor, dry soils, producing gorgeous thistle-like purple flowers that bees and other pollinators love to visit. A beautiful addition to a wildlife-friendly border.

75 Seeds

30211088

In stock

£3.49

Seed Only Delivery £1.95* | Learn More

Key Features

Marshalls Garden

Long Flowering Season

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Hardy

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Low Maintenance

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Pollinator Friendly

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Self Fertile

Product Information

Eventual Height:

90cm

Position:

Full Sun

Suitable for:

Patio, Small Gardens, Borders, Cottage Garden, Wildlife Garden, Raised Bed

Plant Type:

Perennial

Complete The Job

Growing Calendar

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Sow Indoors

Sow Indoors

Sow Outdoors

Sow Outdoors

Flowering

Flowering
  • Native British wildflower
  • Gorgeous purple flowers in summer
  • Grows well in poor soils
  • Self-seeds liberally

A native British wildflower that thrives on neglect, Centaurea scabiosa (great knapweed) grows even in poor, dry soils, producing gorgeous thistle-like purple flowers that bees and other pollinators love to visit. It makes a beautiful addition to a wildlife-friendly border and will self-seed freely.

Sow indoors

Sow in trays of pre-watered seed compost and cover lightly. Keep at 15-20°C and allow 2 weeks for germination.

Grow on

When large enough to handle. transplant into 8cm pots. Slowly acclimatise to outdoor conditions before planting out after frosts.

Plant out

Choose a sunny spot in any well-drained soil. Plant approximately 25cm apart. Height may vary. For earlier flowering, sow in autumn and overwinter in a cold frame before planting out in spring. Self-seeds readily.

How to grow

Sow seeds on to the surface of pre-watered seed compost, but don't cover them. Keep warm, around 20°C and keep moist, but not wet. Allow 1-2 weeks for germination.

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Soil Type

Sow seeds into seed sowing compost for fast and healthy germination

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