SuDS 70/30 Grass & Wildflower Seed Mix

SuDS Mix 70/30 Meadow Wildflowers is a specialist grass and wildflower seed mixture designed for Sustainable Drainage Systems (SuDS). Combining 70% carefully selected grasses with 30% native wildflowers, this robust mix provides excellent soil stability, rapid establishment, and long-term ecological performance in sites subject to extreme moisture variation, from winter waterlogging to summer drought.

SuDS Mix 70/30 is ideal for swales, attenuation basins, rain gardens, floodplain planting, and water-sensitive landscapes, where hydrological performance must be combined with ecological and aesthetic value. The grass component stabilises soils, prevents erosion, and maintains sward structure, while the wildflowers provide seasonal colour, pollinator resources, and biodiversity value.

Designed for developers, civil engineers, landscape architects, BNG partners, and local authorities, SuDS Mix 70/30 ensures that SuDS projects deliver functional drainage, visual appeal, and ecological benefits simultaneously. The combination of hardy grasses and diverse wildflowers supports long-term resilience, low-input management, and ecological restoration goals.

Features & Benefits

70% grasses for soil stability, erosion control, and rapid establishment

30% native wildflowers for seasonal colour, nectar, and pollinator support

Tolerates winter waterlogging and summer drought once established

Supports biodiversity, including bees, butterflies, and other beneficial insects

Ideal for SuDS swales, attenuation basins, rain gardens, and floodplain planting

Low-maintenance, resilient, and long-term ecological performance

Contributes to BNG, ecological mitigation, and water-sensitive urban design

Applications

Developers & Civil Engineers: SuDS features, water-sensitive urban design, flood mitigation projects

Councils & Local Authorities: Swales, attenuation basins, rain gardens, and wetland margins

Landscape Architects & Contractors: Ecological planting in infrastructure projects, urban and rural landscapes

Conservation & Ecological Projects: Habitat creation, wetland enhancement, low-input biodiversity areas

How to Sow & Care

Seedbed Preparation: Prepare a fine, firm seedbed. Remove aggressive weeds and reduce compaction where possible to ensure seed-to-soil contact.

Sowing: Broadcast evenly at 25–35 g per m² and lightly roll or tread. Avoid deep sowing.

Establishment: Grasses establish quickly to stabilise soils, while wildflowers flower from year one. Full species diversity develops over 2–3 growing seasons.

Management: Cut once or twice annually depending on SuDS design objectives. Remove arisings to prevent nutrient build-up.

Long-Term Care: Minimise fertiliser use and soil disturbance to maintain species balance, wildflower diversity, and ecological value.

Growing Conditions

Location: Best suited to SuDS features and water-sensitive landscapes including swales, attenuation basins, rain gardens, and wetland margins

Shade Tolerance: Prefers full sun to partial shade; flowering and pollinator activity may reduce under heavy shade

Soil Type: Adapted to soils experiencing winter waterlogging and summer drying, including compacted or engineered substrates

Soil Fertility: Low to moderate fertility ideal; high fertility encourages grasses at the expense of wildflowers

Moisture: Tolerates seasonal waterlogging and summer drought once established

Latin Name | Mixed grasses and native wildflowers

Flowering Time | May – September (varies by species)

Flowering Height | 20 – 150 cm depending on species and moisture conditions

Life Cycle | Perennial / Biennial / Annual mix

Sowing Rate | 4-5 g per m²

Sowing Period | Spring (March–May) or Autumn (August–October)

Preferred Conditions | SuDS features and water-sensitive landscapes; full sun to partial shade; low to moderate fertility

Pollinator Friendly | Yes, supports bees, butterflies, hoverflies, and other beneficial insects

Minimum Order Quantity | 100g

Ideal For | SuDS swales, attenuation basins, rain gardens, floodplain planting, wetland conservation, BNG delivery, low-input ecological landscaping