Zone 5 · Autumn Crocus
Planting Autumn Crocus in Zone 5
Colchicum autumnale
✅ Autumn Crocus thrives in zone 5 (hardy 4–9)
Can I plant today?
⏳ Too early to direct-sow
Last frost is in 4 weeks. Wait until soil warms.
Evaluated for April 27, 2026 ·
Zone's last frost
around May 15
Zone's first frost
around October 15
Bloom window
September – October
Peak bloom
September
Sun required
full sun, part sun
Mature height
8"
Spacing
6" apart
Type
bulb
How to plant Autumn Crocus in zone 5
Plant corms in late summer 4 inches deep. Blooms emerge leafless in fall — foliage follows in spring.
Pair with these for continuous bloom
Autumn Crocus peaks in September. These companions keep your bed in color before and after.
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