Sea Campion (Silene uniflora) is a resilient native UK wildflower commonly found on coastal cliffs, shingle banks, and rocky shores. Recognised by its trailing grey-green foliage and delicate white, balloon-shaped flowers, this perennial species is well adapted to poor, free-draining soils and exposed conditions. Sea Campion brings visual interest to coastal planting schemes and dry meadows while providing a nectar source for insects.

Ideal for nutrient-poor, sandy, or rocky soils, Sea Campion thrives in full sun and tolerates wind, salt spray, and drought. Its low-growing, clump-forming habit makes it a great choice for green roofs, coastal restoration, and habitat creation in challenging environments.

Features & Benefits
Distinct white flowers with inflated calyxes
Native UK wildflower for coastal and dry soils
Low-growing perennial suited to exposed locations
Tolerant of salt, drought, and wind
Supports pollinators in coastal habitats

Latin Name:
Silene uniflora

Flowering Time:
May – August

Flowering Height:
10 – 30 cm

Life Cycle:
Perennial

Wildflower Seed Approximate Sowing Rate:
2.75kg per acre (6.8kg per hectare)

Sowing Times:
Spring (March – May) or Autumn (August – October)

How to Sow & Preparation
Prepare a free-draining, low-fertility seedbed by removing weeds and lightly raking.
Broadcast seed evenly and press into the soil surface—do not bury.
Avoid fertilising the soil to preserve competitive balance.
Water if dry, but Sea Campion establishes well in lean, dry soils.
Cut back competing vegetation during establishment to encourage growth.

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.

Latin Name | Silene uniflora

Flowering Time | May – August

Flowering Height | 10 – 30 cm

Life Cycle | Perennial

Sowing Rate | 2.75 kg per acre (6.8 kg per hectare)

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

Preferred Conditions | Dry, sandy, or rocky soils; full sun; coastal exposure

Pollinator Friendly | Yes

Minimum Order Quantity | 10g

Ideal For | Coastal areas, cliffs, dunes, green roofs, dry meadows