trefle.io · Taken May 21, 2018 by César Gonzalez (cc-by-sa)
Iridaceae
Flag iris
Iris pseudacorus
Also known as Iris pseudacorus f. albescens, Iris pseudacorus var. longifolia, Iris pseudacorus f. longiacuminata, Xiphion pseudacorus
Native Plants · Iris · Yellow · Flowers · Pond · Wetland · Perennial · Rhizome · Water · Garden
Flag iris thrives in moist to wet soil and full to partial sun, making it perfect for pond edges or rain gardens. This hardy perennial produces striking yellow flowers in late spring and spreads naturally through rhizomes. Divide clumps every 3-4 years to maintain vigor and prevent overcrowding.
Growing conditions
The details behind the basics
- Daily light
- 6 hours
- Watering
- Water deeply when top inch of soil feels dry, reduce in winter · Keep consistently moist during growing season
- Maintenance
- Moderate
- Soil
- loam
- Soil pH
- 7–7.5
- Temperature
- -30°F to 95°F
- Cycle
- Perennial
- Propagation
- Seed
Hardiness
USDA 4a-10b
Form & growth
Mature size and habit
- Mature height
- 2 ft – 5 ft
- Spread
- 3 ft
- Spacing
- 18 in apart
- Growth rate
- Moderate
- Root depth
- Medium
- Flowers
- No
- Foliage
- Medium
Ecology & origin
Where it belongs and what it brings
- Native to
- Alabama, Albania, Algeria, Argentina Northeast, Arkansas, Austria, Baleares, Baltic States, Belarus, Belgium, British Columbia, Bulgaria, California, Central European Rus, Colorado, Corse, Czechoslovakia, Delaware, Denmark, District Of Columbia
- Attracts
- Bees, Butterflies
Sources: trefle, usda
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