Iris pseudacorus

Pale Yellow Iris, Yellow Flag

Per NYS Regulation Part 575, this species is classified as an Invasive Species, and as a NYS based business we are not able to sell these seeds regardless of where the purchaser is located. We have this item listed for reference only.

  • Iris pseudacorus

Please select the quantity desired, and we will advise availability and price as soon as possible.


Min. hardiness zone:
Item ID:

Growing Info

Scarification: Soak in water, let stand in water for 24 hours
Stratification: warm stratify for 30 days, cold stratify for 60 days
Germination: sow seed 1/4" deep, tamp the soil, mulch the seed bed

Other: mechanical rupture of the pericarp is recommended before stratification 

Iris pseudacorus, also known as Yellow Iris or Yellow Flag, is a beautiful herbaceous perennial that is native to Europe, western Asia and northwest Africa. Its leaves have a sword-like shape and a prominently veined mid-rib, similar to those of Acorus calamus, which earns it the specific epithet "false acorus". This plant produces bright yellow flowers, with a typical iris form, and a dry capsule fruit containing numerous pale brown seeds. Iris pseudacorus grows best in wet conditions and is often found in wetlands, where it tolerates submersion, low pH, and anoxic soils. It spreads quickly, through both rhizome and water-dispersed seed, making it a great choice for bog gardens. Its ability to take up heavy metals through its roots makes it useful for water treatment and as an indicator plant in biology experiments. However, it can also become an invasive species in non-native regions, where it out-competes other plants and can be difficult to remove. Despite its toxic qualities, the rhizome has been historically used for herbal remedies and ink-making. This stunning plant has gained the Royal Horticultural Society's Award of Garden Merit and is a must-have for any water garden enthusiast.

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269 NY-34 Locke NY 13092

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