Iris pseudacorus 'Variegata' Care Guide
Iris pseudacorus 'Variegata' is a variegated yellow flag cultivar for pond margins, with cream-and-green spring foliage and yellow flowers.
Compiled by Aquairi from published sources · Published · Updated
Overview
Iris pseudacorus 'Variegata' is a cultivated form of the yellow flag iris grown for its striped foliage. The species itself is a herbaceous perennial native to Europe, western Asia and northwest Africa. The cultivar carries the same bright yellow flowers but is valued for cream-and-green variegated leaves, which are most vivid in spring and fade toward green by summer. It is a marginal pond plant rather than a fully submerged aquarium species.
Taxonomy
- Family: Iridaceae
- Genus: Iris
- Scientific name: Iris pseudacorus 'Variegata'
- Common synonyms: Variegated Yellow Flag Iris
Habitat
The parent species grows in wetlands and shallow water, where it tolerates submersion, low pH and anoxic soils, often alongside Typha. It spreads quickly in the wild by both rhizome and water-dispersed seed, and outside its native range has become an invasive aquatic plant forming dense single-species stands. The 'Variegata' cultivar is reported to be less vigorous than the species, making it more manageable in cultivation.
Tank requirements
- Placement: marginal / background, emersed growth
- Planting depth: pond edge to about 30 cm of standing water
- Temperature: 5-26 °C (41-79 °F)
- pH: 6.0-8.0
- GH: 4-20 °dGH
- Lighting: high (full sun to partial shade)
- CO2: not required
- Mature height: up to about 90 cm
Growth and propagation
This is a medium-growing, emergent plant grown from a rhizome. In cultivation it is propagated by rhizome division. The variegation is strongest in spring; cream-and-white striping commonly fades as the season warms, after which the plant produces yellow flowers.
Notes and cautions
Propagating Iris pseudacorus 'Variegata' by Rhizome Division
Overview
Iris pseudacorus 'Variegata' is the variegated form of yellow flag iris, a herbaceous perennial reaching 100-150 cm tall and native to Europe, western Asia and northwest Africa. It is a marginal, emergent bog and pond plant: it grows in very wet conditions and shallow water and tolerates submersion of the rootstock, but it is not a fully submerged aquarium plant. It spreads by rhizomes and by water-dispersed seeds, and tolerates a wide range from low pH and anoxic soils to high salinity.
Propagation Method
This iris is propagated by rhizome division. Its creeping rhizome is lifted and cut into sections, each carrying its own roots and a growing point, which are then replanted. Division is the reliable way to keep the cream-and-green variegation true, since seed-grown plants do not stay variegated.
Step-by-Step
- Lift an established clump and rinse soil from the rhizome.
- Cut the rhizome into sections, each with roots and at least one healthy fan of leaves.
- Trim the leaves back to reduce water loss while the division re-establishes.
- Replant each section at the pond margin or in a planting basket, with the rhizome just at or below the wet soil surface.
- Keep the soil saturated or in shallow water until new growth appears.
Conditions for Healthy Growth
- Marginal position in shallow water or constantly wet, nutrient-rich soil.
- Full sun for best growth and the strongest variegation.
- Tolerant of cool, temperate conditions and a broad pH range.
- Grown emergent, with foliage in air, not as a submersed aquarium plant.
Maintenance
Vigorous clumps benefit from lifting and dividing every few years to relieve congestion and renew the variegated foliage. Because it can remove nitrogen and phosphorus from water, it works well in planting baskets that you can lift to control its spread. All parts of the plant are poisonous, so wear gloves when handling rhizomes.
Common Challenges
- Uncontained rhizomes spread aggressively and rhizome fragments readily re-sprout.
- Seeds float and disperse on water, so removing spent flowers limits unwanted spread.
- Variegation can fade in shade; give the plant strong light.
- It will rot if grown as a permanently submerged aquarium plant rather than as a marginal.