Iris glaucescens is a small rhizomatous perennial iris from Central Asia and eastern Europe, with blue-grey sickle-shaped leaves and blue to purple spring flowers. It needs hot dry summers, cold dry winters and very well-drained sandy soil, and it is rarely cultivated.
Family
Iridaceae (Iris family)
Grows as
Perennial
Light
Full sun
Water
Water sparingly and keep the rhizomes dry, since waterlogged soil rots them.
Soil
Very well-drained sandy or gritty soil.
Temperature
Hardy to roughly USDA zones 2 to 3; needs hot summers and dry winters.
How easy
Hard
Safety
Toxic: Rhizome and leaves are poisonous; ingestion can cause stomach pain and vomiting, and handling may cause skin irritation or allergy.
Native range
E. European Russia to NW. Mongolia
Climate
temperate
About
Iris glaucescens is a plant species in the genus Iris and subgenus Iris. It is a rhizomatous perennial, found in Russia, Kazakhstan, Mongolia and China. It has blue-grey sickle-shaped leaves, slender stem, and spring flowers in blue-violet, pale violet, lilac-purple, to deep purple, to light bluish, and almost white shades. It is rarely cultivated as an ornamental plant in temperate regions. It was merged with another similar iris in the region, and became a synonym of Iris scariosa, before being divided into two separate species again, although some sources still call it a synonym of Iris scariosa.
How to grow it
It is hardy to between USDA Zone 2 and Zone 3.
It was tested for hardiness in Russia, at the botanical gardens of Barnaul, Novosibirsk, St. Petersburg (where it winters without shelter), Ufa (it produces seeds), but it has proved difficult to cultivate. As it needs hot summers and dry winters.
Safety
Like many other irises, most parts of the plant are poisonous (rhizome and leaves), and if mistakenly ingested can cause stomach pains and vomiting. Also, handling the plant may cause skin irritation or an allergic reaction.
Text excerpted from the Wikipedia article Iris glaucescens by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.