Zone 6 · Hollyhock
Planting Hollyhock in Zone 6
Alcea rosea
✅ Hollyhock thrives in zone 6 (hardy 3–8)
Can I plant today?
✅ Safe to plant Hollyhock outside
Last frost has passed. Typically biennial — plant in summer for next-year bloom, or grow in spring for short-lived perennial.
Evaluated for April 27, 2026 ·
Zone's last frost
around April 15
Zone's first frost
around October 15
Bloom window
June – August
Peak bloom
July
Sun required
full sun
Mature height
72"
Spacing
24" apart
Type
perennial
How to plant Hollyhock in zone 6
Typically biennial — plant in summer for next-year bloom, or grow in spring for short-lived perennial.
Pair with these for continuous bloom
Hollyhock peaks in July. These companions keep your bed in color before and after.
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