Iris pseudacorus 'Yellow Flag' - Native Iris, Pond Marginal Plant
Iris pseudacorus 'Yellow Flag' - Native Iris, Pond Marginal Plant
£2.60
/
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Planting Time
Flowering Time
Iris pseudacorus, known as yellow flag iris, is a tall UK native iris with grey-green, sword-shaped leaves and bright yellow flowers up to 10 cm across. It flowers from May into July and is a classic plant of wild pond and river margins.
Yellow flag iris at a glance
| Botanical name | Iris pseudacorus |
|---|---|
| Common name | Yellow flag iris, yellow iris |
| Plant type | Vigorous, clump-forming iris; dies back in winter |
| Height and spread | 1–1.5 m tall, spreading 1 m or more |
| Flowers | Bright yellow with brown veining, May to July |
| Position | Full sun or part shade (flowers best in sun) |
| Soil | Wet soil or shallow water |
| Pond depth | 0–15 cm of water over the crown |
| Hardiness | RHS H7 – very hardy (below -20°C) |
| Native to | UK and Ireland (native wild flower) |
Is yellow flag iris right for a small pond?
Only in a basket. It is vigorous, reaches 1–1.5 m and can take over a small pond if planted loose. It is best for larger wildlife ponds, lakes and stream banks.
Is it good for wildlife?
Yes. It is on the RHS Plants for Pollinators list. Bees visit the flowers and dragonflies use the leaves to emerge from the water.
How to plant and care for it
Plant in spring or summer with up to 15 cm of water over the crown. Remove seed heads before they ripen to stop it seeding around, and divide clumps every 2–3 years.
Is yellow flag iris poisonous?
Yes. All parts are harmful if eaten by people or pets, and the sap can irritate skin, so wear gloves when handling or dividing it.
Which size should I buy?
Bare-root plants (7 cm, 9 cm, 1 litre and 3 litre) arrive without a pot or compost and are the most economical way to plant a group. Potted plants (9 cm, 1 litre and 3 litre) arrive growing in our peat-free compost and give a faster display. Packs of 3 cost less per plant. The 2x Pot & Compost option is two plants supplied with pots and compost.
Pond depth: 0 - 15cm
Light: Full sun or part shade
Hardiness: Hardy
Height and spread: 120cm+ tall, 100cm+ wide
Planting and flowering months are shown in the calendar under the photos.
Bare root (7 cm, 9 cm, 1 litre, 3 litre): plants sent without a pot or compost, ready to plant straight away. The most economical way to plant a group.
Potted (9 cm, 1 litre, 3 litre): plants growing in our recycled, peat-free compost made in Lincolnshire. Larger sizes give a faster display.
Pack of 3 (7 cm bare-root, 9 cm bare-root, 1 litre bare-root, 3 litre bare-root): three plants of the chosen size at a lower price per plant.
2x Pot & Compost: two plants supplied with pots and compost.
Sizes shown with a line through them are currently unavailable.
At Lincs Plants, we strive to provide fast and reliable shipping to ensure your plants arrive in perfect condition. We offer 1-3 day shipping through a variety of dispatch methods to suit your needs.
Processing Time:
Orders are processed within 1 - 3 business day after payment confirmation. Orders placed on weekends or public holidays will be processed the next business day.
Shipping Methods:
- Standard Shipping (1-3 days)
- Express Shipping (1-2 days)
Should you have any questions or concerns about your shipment, feel free to contact us.
Subscribe to our newsletter
Subscribe for Deals and Discounts