How to grow Siberian Bugloss in the UK
Brunnera macrophylla
Siberian Bugloss (Brunnera macrophylla) is a flower that grows well in UK gardens. 'Jack Frost' has stunning silver leaves. Loves the same conditions as hostas. This guide covers when and how to sow Siberian Bugloss, the soil and position it likes, watering and feeding, companion planting, and when to harvest.
When to sow & grow Siberian Bugloss
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 Bugloss
No specific companion notes for this plant.
Add Siberian Bugloss to your free 12-month plan and get watering & sowing reminders — no sign-up needed.
Siberian Bugloss FAQs
How much sun does Siberian Bugloss need?
Siberian Bugloss prefers full shade.
When should I plant Siberian Bugloss in the UK?
In the UK, plant Siberian Bugloss in April. Planting in this window gives the roots time to establish before the plant is asked to grow away.
Is Siberian Bugloss easy to grow?
Easy — good for beginners. 'Jack Frost' has stunning silver leaves. Loves the same conditions as hostas.