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Yellow Flag Iris in the GardenTags plant encyclopedia

Iris pseudacorus

 

Yellow Flag Iris

Bright yellow flowers with brown markings towards the centre of the petals. This is a clump forming plant that can be invasive, Ideal plant for growing near ponds. It attracts dragon flies.

 
plant Features
  • Yellow Flag Iris likes full sun to partial shade

    Full sun to partial shade

  • Yellow Flag Iris likes occasional watering

    Occasional watering

  • Yellow Flag Iris is frost hardy: 23f (-5°c)

    Frost Hardy: 23F (-5°C)

  • Yellow Flag Iris likes light and free draining

    Light and free draining

 
Similar plants are available to buy from 1 store(s) in the UK
 
plant information

Common name

Yellow Flag Iris

Latin name

Iris pseudacorus

type

Herbaceous Perennials

family

Iridaceae

ph

6.0 - 7.0 Acid - Neutral

  • Light

    Yellow Flag Iris likes full sun to partial shade

    Full sun to partial shade

  • Frost

    Yellow Flag Iris is frost hardy: 23f (-5°c)

    Frost Hardy: 23F (-5°C)

  • Soil

    Yellow Flag Iris likes light and free draining

    Light and free draining

  • Water

    Yellow Flag Iris likes occasional watering

    Occasional watering

Plant & bloom calendar

  •  
    Best time to plant

full grown dimensions

The size of a fully grown Yellow Flag Iris is 1.50meters x 1.50meters 1.50 M 1.50 M

Iris pseudacorus

Bright yellow flowers with brown markings towards the centre of the petals. This is a clump forming plant that can be invasive, Ideal plant for growing near ponds. It attracts dragon flies.


Propagating by division

From Mid Autumn TO Late Autumn

Split the irises every year, immediately after flowering has ended. At this point the early summer leaves and flower stems have started to die back, and the late summer leaves have started to grow. Split individual plants with a light spade, leaving the part to be retained undisturbed in the soil. Remove about 30-50% of the total plant mass. The aim is to leave plants about the size that would fit under an A5 sheet of paper. After splitting, cut back the early-summer leaves on the remaining plants, and cut or break off the flower stems. Finally, top-dress the plants.

 

Planting in late Summer

From Mid Summer TO Late Summer

Ideally the Iris plant would need to be planted in a sunny spot so that it can receive at least six hours of sun a day as well as being planted in well drained but moist soil. They do well near water but should be at least 6 inches above water level. Avoid hoeing around the base of the plants as the roots are near the surface and easily damaged. Plenty of mulch can help avoid weed growth around them, although rhizomatous varieties should not be mulched, as this could rot the rhizomes.

 

Planting bulbs

From Late Summer TO Early Autumn

The bulbs should be planted in late Summer or Autumn, and only about 2in deep. Great care must be taken when planting this iris not to damage the fleshy roots. Add coarse grit and bone meal before planting.

 
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