Common St John's Wort (Hypericum perforatum) is a native UK perennial wildflower known for its clusters of bright yellow star-shaped flowers that bloom throughout summer. It thrives in well-drained soils and full sun, often found on grasslands, roadside verges, and woodland edges. Its cheerful flowers are a rich nectar source for bees, butterflies, and other pollinators, while its dense foliage supports a variety of insect life.
Common St John’s Wort is not only ecologically beneficial but also has a long history of herbal use. It establishes well in low-maintenance wildflower areas and is a strong choice for biodiversity-focused landscaping schemes, especially where visual impact and ecological value are required.
Features & Benefits
Bright yellow flowers attract a wide range of pollinators
Thrives in dry, well-drained soils and full sun
UK native perennial with high ecological value
Supports biodiversity and beneficial insects
Ideal for wildflower meadows, roadsides, and sunny banks
Latin Name:
Hypericum perforatum
Flowering Time:
June – September
Flowering Height:
30 – 90 cm
Life Cycle:
Perennial
Wildflower Seed Approximate Sowing Rate:
0.5kg per acre (1.25kg per hectare)
Sowing Times:
Spring (March – May) or Autumn (August – October)
How to Sow & Preparation
Choose a sunny, well-drained site with minimal fertility.
Clear the area of weeds and create a fine, level seedbed.
Broadcast the seed evenly by hand or spreader.
Gently firm the seed into the soil – do not bury deeply.
Water lightly during dry periods to support germination.
Allow time for slow establishment and avoid cutting in the first season.
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 Hypericum perforatum
Flowering Time June – September
Flowering Height 30 – 90 cm
Life Cycle Perennial
Sowing Rate 0.5kg per acre (1.25kg per hectare)
Sowing Period Spring or Autumn
Preferred Conditions Well-drained, low fertility soils in full sun
Pollinator Friendly Yes
Minimum Order Quantity 100g
Ideal For Meadows, roadsides, sunny slopes, and biodiversity mixes