Zone 7 · Delphinium
Planting Delphinium in Zone 7
Delphinium elatum
✅ Delphinium thrives in zone 7 (hardy 3–7)
Can I plant today?
✅ Safe to plant Delphinium outside
Last frost has passed. Plant in spring in rich, moist soil. Stake tall spires; cut back for a second fall bloom. Toxic if eaten.
Evaluated for April 27, 2026 ·
Zone's last frost
around April 15
Zone's first frost
around November 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 7
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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