Iris 'pseudacorus'

yellow flag

• Position: full sun or partial shade
• Depth of water: 5-25cm (2-10in)
• Rate of growth: fast-growing
• Flowering period: July and August
• Flower colour: sulphur yellow
• Other features: all parts of the plant may cause severe discomfort if ingested
• Hardiness: fully hardy
  
  Sulphur yellow flowers, often with brown or violet markings in July and August and ribbed, grey-green leaves. This native, yellow flag iris was once commonly found on marshy land and riversides. Ideal for planting at the margins of a large lake or pool, it flourishes in deep, acid soil enriched with well-rotted organic matter.
  
  
• Garden care: Divide large clumps immediately after flowering.
  
  
• Goes well with: Iris laevigata, Acorus calamus, Carex elata 'Aurea', Typha minima, Juncus effusus f. 'Spiralis', Sisyrichium californicum.