Iris laevigata - Japanese Water Iris, Pond Marginal Plant
Iris laevigata - Japanese Water Iris, Pond Marginal Plant
£19.50
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Planting Time
Flowering Time
Iris laevigata, known as Japanese water iris, is a true water iris with upright, sword-shaped leaves. In May and June it carries rich purple flowers 8–10 cm across, each petal marked with a narrow white flash.
Japanese water iris at a glance
| Botanical name | Iris laevigata |
|---|---|
| Common name | Japanese water iris |
| Plant type | Clump-forming iris; dies back in winter |
| Height and spread | About 70 cm tall, up to 50 cm wide |
| Flowers | Rich purple, 8–10 cm across, with a white flash, May and June |
| Position | Full sun |
| Soil | Wet, rich, acid soil or shallow water |
| Pond depth | 0–10 cm of water over the crown |
| Hardiness | RHS H6 – hardy in a very cold winter (-20 to -15°C) |
| Native to | Temperate Asia (not UK native) |
Can Japanese water iris grow in water?
Yes. Unlike Iris ensata, it is happy standing in shallow water all year, with up to 10 cm of water over the crown.
Where to plant it
- A sunny pond shelf, 0–10 cm deep
- The wet margins of ponds and streams
- Wildlife and formal ponds
How to plant and care for it
Plant in spring or summer in rich, preferably acid soil. Divide clumps from midsummer to early autumn. Watch for iris sawfly on the leaves.
Is it poisonous?
Yes. Irises are harmful if eaten by people or pets, so wear gloves when handling 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 come in 7 cm, 9 cm, 1 litre and 3 litre bare-root sizes and cost less per plant. The 2x Pot & Compost option is two plants supplied with pots and compost.
Pond depth: 0 - 10cm
Light: Full sun
Hardiness: Hardy
Height and spread: 40 - 80cm tall, 30 - 50cm 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.
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