Zone 4 · Siberian Bugloss
Planting Siberian Bugloss in Zone 4
Brunnera macrophylla
✅ Siberian Bugloss thrives in zone 4 (hardy 3–8)
Can I plant today?
⏳ Not the right window
Siberian Bugloss has a specific planting window in zone 4. Check back in spring.
Evaluated for July 28, 2026 ·
Zone's last frost
around May 15
Zone's first frost
around September 15
Bloom window
April – May
Peak bloom
April
Sun required
part sun, shade
Mature height
18"
Spacing
18" apart
Type
perennial
How to plant Siberian Bugloss in zone 4
Plant in moist shade in spring. Silver-heart foliage glows in dim corners.
Pair with these for continuous bloom
Siberian Bugloss peaks in April. These companions keep your bed in color before and after.
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