Yellow Flag Iris
Iris Pseudacorus
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 2–9Type PerennialClimate Temperate

Culture
- Sun
- Full, Half
- Water
- Extra in Summer, Medium
- USDA zones
- 2–9
Shape & size
Classification
- Type
- Perennial
- Family
- Iridaceae
- Climate
- Temperate
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Photographs by 17 contributors
- gailhampshire, CC BY 2.0 · source
- Björn S..., CC BY-SA 2.0 · source
- Phil Sellens from East Sussex, CC BY 2.0 · source
- Marc Ryckaert, CC BY-SA 4.0 · source
- Walter Baxter, CC BY-SA 2.0 · source
- Christine, CC BY 2.0 · source
- Sonja Kostevc, CC BY 2.5 si · source
- houroumono, CC BY 2.0 · source
- Ivar Leidus, CC BY-SA 4.0 · source
- Albarubescens, CC BY-SA 4.0 · source
- Robert Flogaus-Faust, CC BY 4.0 · source
- Kenneth Allen, CC BY-SA 2.0 · source
- Mike Pennington, CC BY-SA 2.0 · source
- Joe Dillon, CC BY 4.0 · source
- Audrey from Central Pennsylvania, USA, CC BY 2.0 · source
- A. Barra, CC BY 3.0 · source
- João Valença, CC BY-SA 4.0 · source
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