Iris histrioides
Iris histrioides
One of the earliest bulbs to flower, often appearing in January before snowdrops are fully open. Vivid blue flowers with darker markings and a yellow ridge on the falls. More robust than reticulata and less prone to splitting. Cultivar 'Major' has particularly large flowers. Outstanding in UK rock gardens.
Where to plant
Best aspect
Border position
When to plant and expect flowers
Plant
Flowers
How to grow iris histrioides
Plant 8cm deep in autumn. Flowers earlier than reticulata, often in January. More reliable at perennialising than danfordiae. The cultivar 'Major' has the largest flowers. Excellent in troughs and raised beds where early flowers can be appreciated up close.
Soil requirements
Soil type
sand, loam
Moisture
well drained
pH
neutral, alkaline
Aftercare
Allow foliage to die back naturally after flowering. Remove spent flower heads to prevent self-seeding.
Propagation
- Offsets in autumn
- Seed
Wildlife value
Toxicity
Mildly toxic. Contains irisin compounds causing gastrointestinal upset if ingested.
Common problems
- Ink disease
- Slugs on flowers
- Rot in waterlogged soil
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