Overview
Iris 'Blue Icing' (IB) is a clump forming herbaceous perennial in the genus Iris, part of the Iridaceae family, with deciduous foliage. Iris 'Blue Icing' (IB) grows best in full sun, and tolerates loam soils and neutral pH. Its UK hardiness is rated H6. Suggested uses include city and courtyard gardens, cottage and informal garden, patio and container plants, cut flowers and flower borders and beds.
About
Iris 'Blue Icing' is a clump-forming cultivar of the Iris genus, known for its deciduous foliage and upright stems bearing distinctive flowers in spring. As a member of the Iridaceae family, it thrives in full sun with a sheltered aspect, ideally facing south, east, or west. This cultivar prefers well-drained, neutral loam soil and is hardy to UK zone H6. Suitable for city gardens, patios, and flower borders, it is best grown by planting rhizomes shallowly with the top exposed and requires watering during dry spells without waterlogging.
About the genus
Iris takes its name from the Greek goddess of the rainbow, and for once the naming feels entirely earned. I can't think of another genus that covers so much ground — inky purples, burnt apricots, clean whites, blues that seem lit from inside — or so many situations. There are bearded irises that want their rhizomes baked in full sun, Siberian types happy in ordinary border soil, and species that will sit contentedly at the edge of a pond. What they share is the flower: three petals standing up, three falling away, built with a kind of architectural confidence most plants never attempt. Even out of bloom the foliage earns its place — those upright fans of blue-green leaves hold a border together for months. I grow them for the fortnight in May and June when nothing else in the garden can compete, and I've made my peace with that. Some plants are for the long haul. An iris is an event.
Written by Henry
Growing conditions
Best soil and position for Iris
- Sunlight
- Full sun
- Soil type
- Loam
- Soil pH
- Neutral
- Soil moisture
- Well-drained
- Aspect
- South-facing, East-facing, West-facing
- Exposure
- Sheltered
- UK hardiness
- H6
Plant details
Iris 'Blue Icing' (IB) size, habit and characteristics
- Plant type
- Herbaceous Perennial
- Habit
- Clump forming
- Foliage
- Deciduous
- Suggested uses
- City and courtyard gardens, Cottage and informal garden, Patio and container plants, Cut flowers, Flower borders and beds
Care notes
Pruning and caring for Iris 'Blue Icing' (IB)
- Propagation
- Division of rhizomes
- Pest resistance
- Slugs, Snails, Thrips
- Disease resistance
- Aphid-borne viruses, Bacterial soft rot, Grey moulds
Frequently asked questions
Where is the best place to plant Iris 'Blue Icing' (IB)?
Iris 'Blue Icing' (IB) prefers full sun. It suits sheltered positions.
What soil does Iris 'Blue Icing' (IB) need?
Iris 'Blue Icing' (IB) grows best in loam soil. It prefers neutral soil. Aim for soil that stays well-drained.
Is Iris 'Blue Icing' (IB) hardy in the UK?
Iris 'Blue Icing' (IB) has an RHS hardiness rating of H6, meaning it is very hardy, tolerating -20 to -15°C across most of the UK.
How do I propagate Iris 'Blue Icing' (IB)?
Division of rhizomes.
More in the Iris genus
- Iris 'Antigone' (TB)

- Iris 'Dauntless' (TB)

- Iris 'Dipped in Dots' (TB)

- Iris 'Ablaze' (MDB)
- Iris 'After the Storm' (TB)
- Iris 'Aldo Ratti' (TB)
- Iris 'Alene's New Love' (SDB)iris 'Alene's New Love'
- Iris 'Alpine Lake' (MDB)