Skip to content

Yellow Flag Iris

Iris Pseudacorus

Design with this plant

Overview

The Yellow Flag Iris (Iris pseudacorus) is a captivating perennial, ideal for water features with its vibrant yellow blooms and sword-like green foliage. Thriving in zones 4-9, it reaches 3-4 feet in height with a spread of up to 2 feet. Prefers full sun to part shade in wet, marshy conditions. Caution: Invasive in some areas, so check local guidelines. Adds visual interest and naturalizes readily.

Sun Full, HalfWater Extra in Summer, MediumZones 2–9Climate Temperate
Yellow Flag Iris (Iris Pseudacorus) — ideal for water features with its vibrant yellow blooms and sword-like green foliage

Culture

Sun
Full, Half
Water
Extra in Summer, Medium
USDA zones
2–9

Shape & size

Classification

Family
Iridaceae
Climate
Temperate

See full data, regional cultivation notes, full-resolution photos, and design tools. Build a client presentation around this plant.

Start your 14-day trial

Photos (140)

Yellow Flag Iris (Iris Pseudacorus) — yellow flowers in the garden; this robust plant is known for its striking, image 73
Yellow Flag Iris (Iris Pseudacorus) — The Yellow Flag Iris (Iris pseudacorus) is a captivating perennial; prefers full sun to part shade in wet, image 76
Yellow Flag Iris (Iris Pseudacorus) — Caution: Invasive in some areas, so check local guidelines; is a vibrant perennial that offers both aesthetic, image 80
Yellow Flag Iris (Iris Pseudacorus) — perennial for full or half; making it not only a visual asset but also a contributor to environmental health, image 75
Yellow Flag Iris (Iris Pseudacorus) — ideal for water features with its vibrant yellow blooms and sword-like green foliage; during its blooming, image 77
Yellow Flag Iris (Iris Pseudacorus) — perennial with yellow blooms; contrasted by three upright petals, image 74
Yellow Flag Iris (Iris Pseudacorus) — Prefers full sun to part shade in wet, marshy conditions; perennial for full or half, image 79
Yellow Flag Iris (Iris Pseudacorus) — Thriving in zones 4-9, it reaches 3-4 feet in height with a spread of up to 2 feet; withstanding water depths, image 78
Yellow Flag Iris (Iris Pseudacorus) — proudly displays three drooping sepals or "falls," adorned with a striking brown or purple veining; care, image 89
Yellow Flag Iris (Iris Pseudacorus) — Adds visual interest and naturalizes readily; proudly displays three drooping sepals or "falls," adorned with, image 81
Yellow Flag Iris (Iris Pseudacorus) — sword-like foliage that can reach a height of approximately 3 to 4 feet; with individual leaves about 1 to, image 84
Yellow Flag Iris (Iris Pseudacorus) — with individual leaves about 1 to 1.5 inches wide; iris pseudacorus thrives in USDA Hardiness Zones 4 through, image 85
Yellow Flag Iris (Iris Pseudacorus) — During its blooming season from May to July; perennial with yellow blooms, image 86
Yellow Flag Iris (Iris Pseudacorus) — showy flowers that boast a brilliant yellow hue; adds visual interest and naturalizes readily, image 87
Yellow Flag Iris (Iris Pseudacorus) — spanning 3 to 4 inches across, image 88
Yellow Flag Iris (Iris Pseudacorus) — is a vibrant perennial that offers both aesthetic appeal and ecological value to any landscape design; and, image 82
Yellow Flag Iris (Iris Pseudacorus) — This robust plant is known for its striking; thriving in zones 4-9, it reaches 3-4 feet in height with a, image 83
Yellow Flag Iris (Iris Pseudacorus) — perennial for full or half; making it not only a visual asset but also a contributor to environmental health, image 100
Yellow Flag Iris (Iris Pseudacorus) — Care should be taken as it can be invasive in certain regions; showy flowers that boast a brilliant yellow hue, image 95
Yellow Flag Iris (Iris Pseudacorus) — and some states have regulations concerning its cultivation.<br><br>Ecologically; despite its preference for, image 96
Yellow Flag Iris (Iris Pseudacorus) — making it not only a visual asset but also a contributor to environmental health; the Yellow Flag Iris (Iris, image 97
Yellow Flag Iris (Iris Pseudacorus) — yellow flowers in the garden; this robust plant is known for its striking, image 98
Yellow Flag Iris (Iris Pseudacorus) — perennial with yellow blooms; contrasted by three upright petals, image 99
Yellow Flag Iris (Iris Pseudacorus) — contrasted by three upright petals; ideal for water features with its vibrant yellow blooms and sword-like, image 90

Related plants

Reticulated Iris (Iris Reticulata) — The Reticulated Iris (Iris reticulata) is a spring-blooming bulbous perennial

Reticulated Iris

Iris Reticulata

Full · Zones 5–9

Pink Watsonia (Watsonia Strains Pink) — or Watsonia borbonica 'Pink'

Pink Watsonia

Watsonia Strains Pink

Full · Zones 9–10

Idaho Blue-Eyed Grass (Sisyrinchium Idahoense) — is a charming perennial with grassy foliage reaching up to 12 inches tall

Idaho Blue-Eyed Grass

Sisyrinchium Idahoense

Full · Zones 5–7

Sparaxis, Harlequin Flower (Sparaxis Tricolor) — is a vibrant bulbous perennial showcasing a star-shaped display of multicolored petals

Sparaxis, Harlequin Flower

Sparaxis Tricolor

Full · Zones 3–10

Del Norte Iris (Iris Innominata) — Del Norte Iris (Iris innominata) is a Pacific Coast native

Del Norte Iris

Iris Innominata

Full · Zones 8–10

Iris Species (Iris Spp.) — offer a captivating array of colors, often with intricate patterns

Iris Species

Iris Spp.

Full · Zones 7–9