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Iris prismatica

To swap with Nikki P

This grower is fairly sure of this plant identification.

my variety is a darker purple blue than that in the photos, very pretty. forms good clump and lovely in the spring

Plant Size
70cm × 100cm × 5

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Plant Finder: about Iris prismatica

Common names

Iris, Flag iris, Fleur-de-Lys, Sword lily


Iris prismatica (Iris). A rhizomatous, beardless iris with thin, wide-spreading rhizomes which forms large clumps of grass-like leaves and grows up to 70cm long. It bears clusters of violet-blue flowers, veined blue on slender, angled stems, in early and mid summer.


They are fully hardy, but some groups may thrive only in specific growing conditions. All irises are best planted in late summer and early autumn. Outdoors you can grow them in well drained, fertile, neutral or slightly acid or alkaline soil in full sun to lightly dappled shade. In order for irises to thrive, most of them need long, hot summers. Irises that require protection from rain or frost should be grown under glass.

Interest and use

Grown for their distinctive and colourful flowers. Suitable for coastal conditions.

Italics = data drawn from parent genus or species

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Iris prismatica | Culmstock, Cullompton, Devon, EX15 | Copyright Greenplantswap 2020
  • LightPart shade
  • HardinessFrost tender (min 5°C)
  • SoilWell drained, Fertile, Light
  • Soil pH5.5 to 7.0
  • WaterSemi-moist

Meet the grower

Culmstock, Cullompton, Devon, EX15
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  • Grower

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  • Swap interests

    Interested in swapping practically anything that isn't invasive! Extension in the new year means I have various stuff free or to swap to anyone who wants to come and dig it up:
    Yellow queen? Helenium ; purple geranium; blue spring iris; acanthus; pink single anemone japonica
    Also interested in seed swapping, taking cuttings and fruit/ veg gluts in season.

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