Zone 8 · Sunflower
Planting Sunflower in Zone 8
Helianthus annuus
✅ Sunflower thrives in zone 8 (hardy 2–11)
Can I plant today?
✅ Safe to plant Sunflower outside
Last frost has passed. Direct-sow after last frost, 1 inch deep.
Evaluated for April 27, 2026 ·
Zone's last frost
around March 15
Zone's first frost
around November 15
Bloom window
July – September
Peak bloom
August
Sun required
full sun
Mature height
72"
Spacing
18" apart
Type
annual
How to plant Sunflower in zone 8
Direct-sow after last frost, 1 inch deep.
Pair with these for continuous bloom
Sunflower peaks in August. These companions keep your bed in color before and after.
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