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Iris pseudacorus · Iridaceae

Yellow Flag Iris

⚠️ Not safe for petsPerennial, remaining green throughout the year.60 to 100 cm
Full sunAbundant watering; soil should always be moist.EasyTolerates prolonged negative temperatures.

Description & origin

The Yellow Flag Iris is a perennial aquatic plant known for its vibrant yellow flowers. It is ideal for pond edges and wetland areas in gardens. Thrives in full sun and waterlogged soils.

Size

Can reach up to 100 cm in height under ideal conditions.

Foliage

Evergreen foliage that remains green year-round.

Flowering

Blooms in spring and early summer with showy yellow flowers.

Detailed care

Light

Prefers full sun for optimal growth.

Soil

Adapts well to clay soils rich in organic matter.

Watering

Requires constantly moist or waterlogged soil.

Temperature

Tolerates cold well, resistant to frost.

Fertilising

Fertilize in spring with a balanced fertilizer to promote flowering.

Repotting

Transplant in spring or autumn, keeping the soil moist.

Pruning

Remove wilted flowers to encourage new blooms.

Propagation

Easily propagated by dividing rhizomes in spring.

Common problems

Root Rot

Occurs in poorly drained or overwatered soils.

Rust

Fungal disease causing spots on leaves.

Aphids

Insects that suck sap and can weaken the plant.

Uses & curiosities

In the garden

  • Pond edges
  • Wetland areas
  • Aquatic gardens

Other uses

Used in wetland restoration.

Did you know…

This plant is often used in wetland restoration projects due to its ability to filter water pollutants.