Yellow Iris (Iris pseudacorus) is a striking, native UK wildflower that thrives in wetland habitats, adding beauty and biodiversity to ponds, marshes, and riverbanks. Known for its large, vibrant yellow flowers and long, sword-like leaves, this perennial plant blooms in late spring to early summer, creating a stunning display in natural landscapes. It is particularly beneficial for attracting pollinators such as bees and butterflies and is often used in wetland restoration and wildlife habitat projects.
Ideal for moist, neutral to slightly acidic soils, Yellow Iris grows well in areas with standing water or along the edges of streams, lakes, and ponds. Its strong root system helps stabilise the soil, making it an excellent choice for erosion control in riparian zones.
Features & Benefits
Bright yellow flowers that bloom in late spring and early summer
Excellent for wetland habitats, including ponds, marshes, and riverbanks
Attracts pollinators such as bees and butterflies
Strong root system that helps prevent soil erosion
Thrives in moist, neutral to slightly acidic soils
Latin Name:
Iris pseudacorus
Flowering Time:
May – June
Flowering Height:
90 – 120 cm
Life Cycle:
Perennial
Wildflower Seed Approximate Sowing Rate:
13.5kg per acre (33.4kg per hectare)
Sowing Times:
Spring (March – May) or Autumn (August – October)
How to Sow & Preparation
Choose a site with moist, neutral to slightly acidic soils, typically along the edges of water bodies or in marshy areas.
Clear any weeds and cultivate the soil to a fine, level seedbed.
Broadcast the seed evenly across the surface, either by hand or using a spreader.
Firm the seed into the soil gently with a roller or by walking over it.
Water the area lightly if dry weather persists, especially during germination.
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 Iris pseudacorus
Flowering Time May – June
Flowering Height 90 – 120 cm
Life Cycle Perennial
Sowing Rate 13.5kg per acre (33.4kg per hectare)
Sowing Period Spring or Autumn
Preferred Conditions Moist, neutral to slightly acidic soils, wetland areas
Pollinator Friendly Yes
Minimum Order Quantity 100g
Ideal For Wetlands, ponds, riverbanks, marshes, erosion control