Zone 6 · False Sunflower
Planting False Sunflower in Zone 6
Heliopsis helianthoides
✅ False Sunflower thrives in zone 6 (hardy 3–9)
Can I plant today?
✅ Safe to plant False Sunflower outside
Last frost has passed. Plant in spring. Long-blooming; shorter, stouter, and more garden-friendly than true sunflowers.
Evaluated for April 27, 2026 ·
Zone's last frost
around April 15
Zone's first frost
around October 15
Bloom window
June – September
Peak bloom
July
Sun required
full sun
Mature height
48"
Spacing
24" apart
Type
perennial
How to plant False Sunflower in zone 6
Plant in spring. Long-blooming; shorter, stouter, and more garden-friendly than true sunflowers.
Pair with these for continuous bloom
False Sunflower peaks in July. These companions keep your bed in color before and after.
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