How to grow Siberian Iris in the UK
Iris sibirica
Siberian Iris (Iris sibirica) is a flower that grows well in UK gardens. Tougher than bearded iris and tolerates damper soil. Seedheads make great winter structure. This guide covers when and how to sow Siberian Iris, the soil and position it likes, watering and feeding, companion planting, and when to harvest.
Type
Flowers
Difficulty
Easy — good for beginners
Position
full sun (6+ hrs direct)
Sow
spring
Harvest
—
When to sow & grow Siberian Iris
Sowing and harvest window through the year (UK):
Jan | Feb | Mar | Apr Plant | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
Soil, position & care
- Soil
- Fertile, moisture-retentive but free-draining soil
- Soil pH
- 6.0–7.5
- Position
- Sun or part shade depending on species
- Sowing depth
- Plant at the same depth as the pot
- Spacing
- 30–60 cm apart
- Sowing
- Plant container-grown stock spring or autumn; divide established clumps in spring
- Growing
- Water well the first season until established; mulch in spring
- Harvest & upkeep
- Cut back faded foliage in late autumn or early spring; divide every 3–4 years
- Watch for
- Slugs and snails on new shoots; otherwise robust
Companion planting for Siberian Iris
No specific companion notes for this plant.
Grow Siberian Iris this year
Add Siberian Iris to your free 12-month plan and get watering & sowing reminders — no sign-up needed.
Siberian Iris FAQs
How much sun does Siberian Iris need?
Siberian Iris prefers full sun (6+ hrs direct).
Is Siberian Iris easy to grow?
Easy — good for beginners. Tougher than bearded iris and tolerates damper soil. Seedheads make great winter structure.