Purple Loosestrife Wildflower Seed (Lythrum salicaria) produces bold purple flower spikes and thrives in wet soils, making it perfect for pond edges, marshes, and wildlife-rich wetland planting schemes.
Benefits
Striking native perennial for wet and marginal areas
Supports pollinators with nectar-rich summer blooms
Adds colour and structure to rain gardens and pond edges
Ideal for biodiversity-focused landscaping and rewilding
Thrives in moist soils with full sun to partial shade
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Purple Loosestrife (Lythrum salicaria) is a tall, striking perennial wildflower native to the UK. It produces vibrant spikes of magenta-purple flowers from mid to late summer and is commonly found in wetland margins, riverbanks, marshes, and damp grasslands. Its long flowering period and nectar-rich blooms make it a favourite among pollinators, especially bees and butterflies.
Ideal for wet, nutrient-rich soils and full sun to partial shade, Purple Loosestrife thrives in naturalistic planting schemes designed to support biodiversity. Its upright habit and eye-catching colour also make it a valuable feature in rain gardens, pond edges, and rewilding projects.
Features & Benefits
Striking magenta-purple flower spikes
Attracts bees, butterflies, and other pollinators
Native UK species ideal for wetland and riparian planting
Long flowering period provides extended ecological value
Adds structure and colour to pond margins and wet meadows
Latin Name:
Lythrum salicaria
Flowering Time:
June – August
Flowering Height:
80 – 120 cm
Life Cycle:
Perennial
Wildflower Seed Approximate Sowing Rate:
0.25kg per acre (0.62kg per hectare)
Sowing Times:
Autumn (August – October) or Spring (March – May)
How to Sow & Preparation
Select a site with moist to wet soils, ideally near ponds, streams, or wet meadows.
Clear any existing vegetation and cultivate a fine tilth on the surface.
Broadcast the seed evenly and press lightly into the soil—do not cover deeply.
Keep the area moist during establishment.
Ideal for sowing alongside other wetland species in marginal areas.
Allow to naturalise and self-seed in suitable conditions.
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 Lythrum salicaria
Flowering Time June – August
Flowering Height 80 – 120 cm
Life Cycle Perennial
Sowing Rate 0.25kg per acre (0.62kg per hectare)
Sowing Period Spring or Autumn
Preferred Conditions Wet or damp soils, full sun to light shade
Pollinator Friendly Yes
Minimum Order Quantity 100g
Ideal For Pond margins, wetlands, riversides, rain gardens
