The Heritage Clay Soils 80% Grass Mix Wildflower Seed is a professionally formulated seed blend ideal for heavy clay soils often found on farmland, floodplains, and development sites. This reliable 80/20 mix includes 80% low-maintenance grass seed and 20% UK native wildflowers, specifically chosen for their ability to thrive in damp, dense, and slow-draining soils.
Perfect for creating resilient wildflower meadows on road verges, hedgerows, farmland set-aside areas, parks, and open spaces, this mix delivers long-term biodiversity benefits while establishing well on sites where poor drainage is a challenge. With wildflowers such as Meadow Cranes-bill, Greater Knapweed, Lady’s Bedstraw, and Oxeye Daisy, it delivers a burst of colour and habitat support for pollinators and wildlife.
All wildflower seed mixes are subject to change, dependent on time of year, harvest, and may include more species than listed above.
Features & Benefits
80% Grass / 20% Wildflower seed mix for challenging clay soils
Promotes natural drainage and soil stabilisation
Provides colourful flowering from late spring through summer
Attracts bees, butterflies, and beneficial insects
Part of the John Chambers Heritage Range for UK habitats
Applications
Farmland set-aside and environmental stewardship schemes
Hedgerows and field boundaries
Parkland and open public spaces
Road verges and embankments
Gardens and large landscaped areas
Clay-rich soils in rural or urban environments
Main Species in the Mix
Meadow Cranes-bill (Geranium pratense)
Ribwort Plantain (Plantago lanceolata)
Greater Knapweed (Centaurea scabiosa)
Lady’s Bedstraw (Galium verum)
Selfheal (Prunella vulgaris)
Oxeye Daisy (Leucanthemum vulgare)
Additional species may be included depending on seasonal availability and harvest conditions.
Sowing Information
Sowing Times:
Spring (March–May)
Autumn (August–October)
Sowing Rate:
80/20 Grass & Wildflower Mix: 4g per m²
Large Coverage: Approx. 40kg per hectare
How to Sow:
Clear existing vegetation and prepare a fine, weed-free seedbed.
Mix seed with dry sand for easy spreading.
Evenly broadcast seed across the surface.
Roll or lightly firm the area to ensure good soil contact.
Do not cover the seed deeply – wildflower seeds need light to germinate.
About John Chambers Wildflower Seed
With over four decades of wildflower expertise, John Chambers Wildflower Seed is a trusted brand for landscape architects, councils, landowners, and contractors. The Heritage Range is made up of carefully selected mixes for UK habitats and soil types, promoting ecological diversity and sustainable land management practices.

Attribute Details
Seed Mix Type 80% Low Maintenance Grass / 20% UK Native Wildflowers
Soil Type Clay and heavy damp soils
Application Sites Farmland, verges, parks, hedgerows, set-aside, open spaces
Flowering Period Spring to late summer
Sowing Time Spring or Autumn
Sowing Rate 4g per m²
Main Wildflowers Meadow Cranes-bill, Greater Knapweed, Lady’s Bedstraw
Minimum Order 100g
Brand John Chambers Wildflower Seed – Heritage Range