Zone 4 · Obedient Plant
Planting Obedient Plant in Zone 4
Physostegia virginiana
✅ Obedient Plant thrives in zone 4 (hardy 3–9)
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 September 15
Bloom window
August – September
Peak bloom
August
Sun required
full sun, part sun
Mature height
48"
Spacing
18" apart
Type
perennial
How to plant Obedient Plant in zone 4
Plant in spring — spreads fast in rich soil. Individual flowers stay where you move them (hence the name).
Pair with these for continuous bloom
Obedient Plant peaks in August. These companions keep your bed in color before and after.
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