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) — or "standards," that taper elegantly to a point.<br><br>Adapted to wet conditions; sword-like foliage that, image 91
Yellow Flag Iris (Iris Pseudacorus) — Iris pseudacorus thrives in USDA Hardiness Zones 4 through 9 and is ideal for planting along pond margins; or, image 92
Yellow Flag Iris (Iris Pseudacorus) — withstanding water depths of up to 4 inches over the crown; yellow flowers in the garden, image 93
Yellow Flag Iris (Iris Pseudacorus) — Despite its preference for full sun, it can tolerate partial shade, where it may produce fewer flowers, image 94
Yellow Flag Iris (Iris Pseudacorus) — Prefers full sun to part shade in wet, marshy conditions; perennial for full or half, image 104
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 108
Yellow Flag Iris (Iris Pseudacorus) — is a vibrant perennial that offers both aesthetic appeal and ecological value to any landscape design; and, image 107
Yellow Flag Iris (Iris Pseudacorus) — Adds visual interest and naturalizes readily; proudly displays three drooping sepals or "falls," adorned with, image 106
Yellow Flag Iris (Iris Pseudacorus) — ideal for water features with its vibrant yellow blooms and sword-like green foliage; during its blooming, image 102
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 103
Yellow Flag Iris (Iris Pseudacorus) — Caution: Invasive in some areas, so check local guidelines; is a vibrant perennial that offers both aesthetic, image 105
Yellow Flag Iris (Iris Pseudacorus) — The Yellow Flag Iris (Iris pseudacorus) is a captivating perennial; prefers full sun to part shade in wet, image 101
Yellow Flag Iris (Iris Pseudacorus) — proudly displays three drooping sepals or "falls," adorned with a striking brown or purple veining; care, image 114
Yellow Flag Iris (Iris Pseudacorus) — Iris pseudacorus thrives in USDA Hardiness Zones 4 through 9 and is ideal for planting along pond margins; or, image 117
Yellow Flag Iris (Iris Pseudacorus) — contrasted by three upright petals; ideal for water features with its vibrant yellow blooms and sword-like, image 115
Yellow Flag Iris (Iris Pseudacorus) — spanning 3 to 4 inches across, image 113
Yellow Flag Iris (Iris Pseudacorus) — withstanding water depths of up to 4 inches over the crown; yellow flowers in the garden, image 118
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 109
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 110
Yellow Flag Iris (Iris Pseudacorus) — During its blooming season from May to July; perennial with yellow blooms, image 111
Yellow Flag Iris (Iris Pseudacorus) — showy flowers that boast a brilliant yellow hue; adds visual interest and naturalizes readily, image 112
Yellow Flag Iris (Iris Pseudacorus) — or "standards," that taper elegantly to a point.<br><br>Adapted to wet conditions; sword-like foliage that, image 116
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 122
Yellow Flag Iris (Iris Pseudacorus) — and some states have regulations concerning its cultivation.<br><br>Ecologically; despite its preference for, image 121

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