Zone 3 · Delphinium
Planting Delphinium in Zone 3
Delphinium elatum
✅ Delphinium thrives in zone 3 (hardy 3–7)
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 September 15
Bloom window
June – July
Peak bloom
June
Sun required
full sun, part sun
Mature height
60"
Spacing
24" apart
Type
perennial
How to plant Delphinium in zone 3
Plant in spring in rich, moist soil. Stake tall spires; cut back for a second fall bloom. Toxic if eaten.
Pair with these for continuous bloom
Delphinium peaks in June. These companions keep your bed in color before and after.
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