Greater Knapweed (Centaurea scabiosa) is a bold and striking native UK perennial, loved for its large, purple thistle-like flower heads that are rich in nectar and highly attractive to butterflies, bees, and other pollinators. It is a key species for wildflower meadows, grasslands, roadside verges, and pollinator corridors, where it adds height, colour, and biodiversity.
Thriving in calcareous or neutral soils with good drainage, Greater Knapweed is ideal for sunny, open sites. Its long flowering season and upright growth habit provide excellent structure and visual appeal, while supporting a wide range of wildlife, particularly in species-rich grassland schemes.
Features & Benefits
Bold purple flowers that attract bees and butterflies
Excellent for meadows, verges, and pollinator habitats
Long flowering season adds lasting seasonal interest
Thrives in well-drained, calcareous or neutral soils
Native UK perennial with strong ecological value
Latin Name:
Centaurea scabiosa
Flowering Time:
June – September
Flowering Height:
60 – 100 cm
Life Cycle:
Perennial
Wildflower Seed Approximate Sowing Rate:
5.5kg per acre (13.5kg per hectare)
Sowing Times:
Spring (March – May) or Autumn (August – October)
How to Sow & Preparation
Choose a well-drained site with full sun exposure, ideally with neutral to calcareous soils.
Clear the area of weeds and cultivate the soil to create a fine seedbed.
Broadcast the seed evenly across the surface and press gently into the soil using a roller or by foot—avoid deep burial.
Water in dry conditions to support establishment.
For best results, include as part of a diverse meadow mix.
About John Chambers Wildflower Seeds
John Chambers Wildflower Seeds has been a trusted supplier of native UK wildflower seeds for over 35 years. Known for its high-quality, locally sourced seed and outstanding customer service, John Chambers provides ecological solutions for landscape contractors, local authorities, and conservationists focused on creating sustainable, biodiverse landscapes.

Attribute Detail
Latin Name Centaurea scabiosa
Flowering Time June – September
Flowering Height 60 – 100 cm
Life Cycle Perennial
Sowing Rate 5.5kg per acre (13.5kg per hectare)
Sowing Period Spring or Autumn
Preferred Conditions Well-drained, neutral to calcareous soils; full sun
Pollinator Friendly Yes
Minimum Order Quantity 100g
Ideal For Wildflower meadows, verges, species-rich grasslands