Yellow Horned Poppy (Glaucium flavum) is a striking coastal wildflower native to the UK, instantly recognisable by its large, bright yellow flowers and distinctive long, curved seed pods that resemble horns. This hardy biennial or short-lived perennial thrives in sandy, well-drained soils, making it particularly suited to coastal restoration, maritime habitats, and dry, open landscapes.

With its silvery-grey foliage and extended flowering season, Yellow Horned Poppy offers both ornamental appeal and ecological value. It supports pollinators like bees and hoverflies and is a tough, drought-tolerant option for specialist planting schemes where other species may struggle.

Features & Benefits
Distinctive yellow flowers with horn-shaped seed pods
Tolerant of dry, sandy, and coastal soils
Supports pollinators including bees and hoverflies
Striking foliage and extended flowering period
UK native suited to specialist and coastal restoration schemes

Latin Name:
Glaucium flavum

Flowering Time:
June – September

Flowering Height:
30 – 80 cm

Life Cycle:
Biennial / Short-lived Perennial

Wildflower Seed Approximate Sowing Rate:
5kg per acre (12.35kg per hectare)

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

How to Sow & Preparation
Select a free-draining, sunny site — ideal for sandy or coastal soils.
Clear weeds and cultivate the area to a fine tilth.
Broadcast the seed evenly by hand or spreader.
Do not bury seed; lightly press into the soil using a roller or by foot.
Water gently during dry periods to aid germination.
Low-maintenance once established, but may require light weeding in early stages.

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 | Glaucium flavum

Flowering Time | June – September

Flowering Height | 30 – 80 cm

Life Cycle | Biennial / Short-lived Perennial

Sowing Rate | 5 kg per acre (12.35 kg per hectare)

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

Preferred Conditions | Sandy, free-draining, coastal soils

Pollinator Friendly | Yes

Minimum Order Quantity | 10g

Ideal For | Coastal areas, sand dunes, maritime and dry habitats