The Heritage Green Roof Wildflower Mix is a premium 100% wildflower seed blend designed specifically for green roof applications, offering ecological value, visual appeal, and enhanced biodiversity in elevated environments. Carefully formulated using UK-native wildflower species, this mix is ideal for use on extensive and semi-extensive green roofs, living roofs, or biodiverse rooftop projects.
Containing drought-tolerant and shallow-rooting species like Viper’s Bugloss, Bladder Campion, Field Scabious, Kidney Vetch, and Oxeye Daisy, this mix thrives in the free-draining substrates typical of roof installations. These wildflowers provide rich nectar sources, making this blend particularly attractive to bees, butterflies, and pollinators.
Part of the trusted John Chambers Heritage Range, this wildflower mix is tailored to perform on low-nutrient, exposed rooftop environments where native species can establish and flourish, while supporting local wildlife and meeting sustainability goals for urban greening and biodiversity net gain.
All wildflower seed mixes are subject to seasonal changes based on harvests. Mixes may include additional suitable species.
Features & Benefits
100% UK-native Wildflowers – No grasses included; maximised flowering diversity
Designed for Green Roofs – Shallow-rooting and drought-tolerant species
Pollinator Friendly – Rich in nectar for bees, butterflies, and insects
Low Maintenance – Ideal for sustainable landscaping in hard-to-reach areas
Trusted Heritage Range – From John Chambers, experts in British native seed
Applications
Green roofs (extensive or semi-extensive)
Commercial or residential rooftops
Urban biodiversity projects
Living architecture schemes
Biodiversity Net Gain (BNG) landscaping
Eco-buildings and rooftop gardens
Main Species in the Mix
Viper’s Bugloss (Echium vulgare)
Bladder Campion (Silene vulgaris)
Field Scabious (Knautia arvensis)
Kidney Vetch (Anthyllis vulneraria)
Oxeye Daisy (Leucanthemum vulgare)
More species may be present depending on seasonal seed availability and site-specific suitability.
Sowing Information
Sowing Times:
Spring (March to May)
Autumn (August to October) – favoured for natural winter stratification
Sowing Rate:
100% Wildflower Mix: 2–3g per m²
Large projects: Approx. 20–30kg per hectare
How to Sow:
Ensure a well-prepared green roof substrate (typically 70–150mm depth).
Mix the seed with dry sand to aid even spreading.
Broadcast evenly by hand or spreader across the surface.
Lightly firm down to improve seed-to-substrate contact—do not bury.
Water gently if conditions are dry after sowing.
Maintenance: Cut once in late summer after flowering.
About John Chambers Wildflower Seed
With over 40 years of expertise in UK-native wildflower cultivation, John Chambers Wildflower Seed leads the way in habitat restoration and biodiversity-focused landscaping. The Heritage Range is curated for specific habitats and soil types, helping professionals, councils, and conservationists meet ecological goals with high-quality, provenance-assured seed.

Attribute Details
Seed Mix Type 100% UK-native Wildflowers (no grasses)
Target Application Green Roofs – Extensive & Semi-Extensive Systems
Soil Requirements Free-draining, low-nutrient green roof substrate
Flowering Window Late spring through summer
Sowing Times Spring (Mar–May) or Autumn (Aug–Oct)
Sowing Rate 2–3g per m²
Main Wildflowers Viper’s Bugloss, Kidney Vetch, Oxeye Daisy, etc.
Minimum Order 100g
Brand John Chambers Wildflower Seed – Heritage Range