The Heritage Calcareous Soils 80% Grass Mix Wildflower Seed is specifically crafted for soils with a high pH or alkaline content, making it the ideal choice for calcareous soils, including limestone and chalk-based terrains. This 80/20 grass-to-wildflower ratio mix is designed to thrive in areas with low fertility while enhancing biodiversity with a stunning blend of native wildflowers and low-maintenance grasses.
Featuring a range of species such as Black Medick, Rough Hawkbit, and Wild Carrot, this mix will flourish in calcareous soils, creating beautiful wildflower meadows and enhancing natural habitats for wildlife. Perfect for landowners, councils, and gardeners looking to restore or improve the landscape in areas with more alkaline soil types.
All wildflower seed mixes are subject to change, dependent on time of year, harvest, and may include more species than listed above.
Features & Benefits
Perfect for alkaline or calcareous soils, such as limestone and chalk
80% low-maintenance grasses, 20% native wildflowers
Attractive to pollinators, including bees, butterflies, and insects
Suitable for low fertility or unimproved grassland areas
Ideal for public parks, road verges, nature reserves, and private estates
Applications
Calcareous soils in natural landscapes, meadows, and verges
Low-fertility sites that need enhancement
Roadside verges, field margins, and wildlife corridors
Public parks, gardens, and nature reserves with alkaline soil
Great for restoring or creating low-maintenance wildflower meadows
Main Species in the Mix
Black Medick (Medicago lupulina)
Rough Hawkbit (Leontodon hispidus)
Wild Carrot (Daucus carota)
Lady’s Bedstraw (Galium verum)
Small Scabious (Scabiosa columbaria)
Wild Basil (Clinopodium 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:
Prepare the soil by removing weeds and other vegetation.
Mix the wildflower seed with sand for even distribution.
Broadcast the seeds evenly across the prepared area.
Lightly firm the soil to ensure good seed-to-soil contact.
Leave the seed on the surface to ensure it gets the light it needs to germinate.
About John Chambers Wildflower Seed
With over 40 years of experience, John Chambers Wildflower Seed offers a range of specially blended seed mixes designed to suit the needs of UK landscapes. The Heritage Range is particularly focused on sustainability and biodiversity, providing tailored wildflower solutions for a wide variety of soil types and habitats.

Attribute Details
Seed Mix Type 80% Low Maintenance Grass / 20% UK Native Wildflowers
Soil Type Suitable for calcareous, limestone, or chalk-based soils
Application Sites Wildflower meadows, road verges, wildlife corridors
Flowering Period Late spring to early autumn
Sowing Time Spring or Autumn
Sowing Rate 4g per m²
Main Wildflowers Black Medick, Wild Carrot, Small Scabious
Minimum Order 100g
Brand John Chambers Wildflower Seed – Heritage Range