Yellow Iris
Iris pseudacorus
Also listed as Limniris pseudacorus, Acorus adulterinus
Also known as Yellow Flag, Yellow Flag Iris, Water Flag
Climate Match for your location
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Yellow Iris is a tall, moisture-loving perennial with bright yellow flowers and sword-like green foliage, naturally thriving in wetland environments. It's excellent for pond margins, rain gardens, and boggy areas where it spreads readily.
Why grow it
Yellow Iris offers reliable yellow flowers and architectural foliage in wet sites where many ornamentals struggle, making it useful for pond edges and rain gardens. Compared to native alternatives like blue flag iris (Iris versicolor), it flowers later in the season and tolerates a wider range of moisture levels, though it lacks the regional ecological value of native species. Its vigor in saturated soil makes it a practical choice for water management landscapes where establishment speed matters.
Watch out for
This plant spreads by rhizome division and seed, requiring periodic removal of volunteer seedlings if you wish to contain it within garden boundaries. Cutting back spent flower stems before seed set helps reduce unwanted spread in managed settings. It can take two to three seasons to reach full flowering size from young plantings.
Overview
- Form
- Growth Rate
- Size
- Dormancy
- Family
- Iridaceae
Native Range
Europe and western Asia
Seasonality
Bloom Season
Season of Interest
Herb
Soft non-woody plants of the field layer.
Succession Role
Tolerances & Soil
Establishment & Care
- Establishment
- Maintenance
- Propagation
Yellow Iris is a tall, moisture-loving perennial with bright yellow flowers and sword-like green foliage, naturally thriving in wetland environments. It's excellent for pond margins, rain gardens, and boggy areas where it spreads readily.
Climate Match for your location
See how well Yellow Iris grows in your area.
Enter your ZIP code and we'll show you how this plant fits your local climate.
Why grow it
Yellow Iris offers reliable yellow flowers and architectural foliage in wet sites where many ornamentals struggle, making it useful for pond edges and rain gardens. Compared to native alternatives like blue flag iris (Iris versicolor), it flowers later in the season and tolerates a wider range of moisture levels, though it lacks the regional ecological value of native species. Its vigor in saturated soil makes it a practical choice for water management landscapes where establishment speed matters.
Watch out for
This plant spreads by rhizome division and seed, requiring periodic removal of volunteer seedlings if you wish to contain it within garden boundaries. Cutting back spent flower stems before seed set helps reduce unwanted spread in managed settings. It can take two to three seasons to reach full flowering size from young plantings.
Overview
- Form
- Growth Rate
- Size
- Dormancy
- Family
- Iridaceae
Native Range
Europe and western Asia
Seasonality
Bloom Season
Season of Interest
Herb
Soft non-woody plants of the field layer.
Succession Role
Tolerances & Soil
Establishment & Care
- Establishment
- Maintenance
- Propagation
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