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Iris pseudacorus (Marginal Aquatic)Yellow Flag

Hardy Perennial

What is Hardy Perennial?
A plant that lives for more than two years.
Capable of withstanding outdoor winter temperatures down to -15C.

FROM £12.99

Our only British native water Iris

Bright yellow blooms attract an abundance of pollinating insects

Adds a strong vertical element to planting schemes

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Iris pseudacorus (Marginal Aquatic)

1 x 9cm Peat-Free Potted Plant

£12.99

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Garden Gear - Garden Snips

1 Pair

£5.99 £7.99

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rootgrow™

1 x 80g Pack

£1.49 £3.99

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Garden Gear - Black & Gold Patio Pot

1 Patio Pot + Saucer

£17.99 £19.99

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Height Up to 100cm (39.4in)
Spread Up to 30cm (11.8in)

Hardy Perennial

cottage gardenswater garden

Sun or semi shade

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Description
Iris pseudacorus is our only British native water Iris. This tall hardy perennial is a spectacular sight as it emerges from the water’s surface, casting elegant reflections. The bright yellow blooms appear in early summer, attracting an abundance of pollinating insects. With its strap-like foliage and tall flower stems, Yellow Flag adds a strong vertical element to planting schemes in damp borders and boggy pond margins. Height: 100cm (39"). Spread: 30cm (12"). Planting depth: Zones 1, 2 & 3 to 20cm (8") below water level.

Plant height and spread is seasonal therefore we list by pot size rather than a defined plant size. The height and spread of the plant delivered will vary depending on the season, meaning arrival images are an indication only.

Eliminate the wait for your plants to mature with our XXL Bare Root Plant range. Planting these XXL clumps offers numerous advantages, particularly for achieving a quicker, more impactful and vibrant display, especially with varieties like Agapanthus, Geraniums or Peonies. These larger clumps, of established plants, provide immediate visual impact by having a well-developed robust root system and multiple green buds, all of which are individual plants which will spring to life once you plant them and work together to provide you with a stunning display from the first year of planting. They are also a great way to overcome the chance of losing younger plants to drought conditions as they are more mature and therefore drought-tolerant once planted.

Show Codes

1 x 9cm Peat-Free Potted Plant (78216)

1 x 1 Litre Potted Plant (78035)

3 x 1 Litre Potted Plants (KH1169)

3 x 9cm Peat-Free Potted Plants (KH1170)

2 XXL Bare Root Clumps (KH6492)

1 XXL Bare Root Clump (KH6491)

How to Grow
Iris pseudacorus plants thrive in damp, acid or neutral soil in a sunny or semi-shaded position. These moisture loving Iris require a rich, fertile soil which has had plenty of well rotted organic matter added into the soil prior to planting. Grow Iris pseudacorus in moist, boggy soils or submerged in the shallow margins of ponds with the crown to a maximum depth of up to 20cm (8") below water level. Choose a position in sun or semi shade.

For more information and guidance check out our Gardening Guides.

More Info
When grown in damp borders, Iris pseudoacorus require reliably moist soil. Water if necessary during dry periods to prevent the soil from drying out. Overcrowded clumps of Iris plants can be divided in autumn after flowering. Mulch around the base of Iris pseudoacorus in spring to help retain moisture at their roots. Iris that are grown in ponds may be cut back to just above the water surface in autumn.
Caution

Caution: irritant to skin and eyes,harmful if eaten

Delivery

Seeds and garden supplies will normally be delivered within the time period stated against each product as detailed above. Plants, bulbs, corms, tubers, shrubs, trees, potatoes, etc. are delivered at the appropriate time for planting or potting on. Delivery times will be stated on the product page above, or in your order acknowledgement page and email.

Orders for packets of seed incur a delivery charge of £2.99.

Orders which include any other products will incur a delivery charge of £6.99.

Where an order includes both packets of seeds and other products, a maximum delivery charge of £7.99 will apply - regardless of the number of items ordered.

Large Non-standard items may incur a higher, lorry delivery charge. Charges will be calculated at checkout, but an example of the lorry charges are listed below.

  • Red - £9.99.
  • Purple - £2.99.

For more information please visit our delivery charges information page by clicking here.

For more information on how we send your plants please visit our Helpful Guide on plant sizes.

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Iris pseudacorus (Marginal Aquatic)

Iris pseudacorus (Marginal Aquatic)

From£12.99

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