Iris pseudacorus 'Yellow Flag' - Native Iris, Pond Marginal Plant
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.
Delivery
Fast & Free Delivery on Eligible Items.
Amazon Customers
We Sell Thousands of the same exact products Amazon have listed; but at a Cheaper Price. So Order Now & Checkout with Amazon Payments; so you can use a payment system you trust and Save Money in the process.
Payment Options
To Select from an Extensive amount of Payment Options; including Credit/Debit Card (Visa/Mastercard etc.) Apple Pay, Shop Pay, Amazon Payments, PayPal & more. Select the "Add to Cart" option and then Select "Checkout."
Returns
Something not quite right? You have 14 days from the day you receive it, to send something back.
Please note, we cannot offer refunds on fashion face masks, cosmetics, pierced jewellery, adult toys, and swimwear or lingerie if the hygiene seal is not in place or has been broken. Items of footwear and/or clothing must be unworn and unwashed with the original labels attached. Also, footwear must be tried on indoors. Items of homeware including bedlinen, mattresses, and toppers, and pillows must be unused and in their original unopened packaging. This does not affect your statutory rights.
Click here to view our full Returns Policy.