Zone 5 · New York Ironweed
Planting New York Ironweed in Zone 5
Vernonia noveboracensis
✅ New York Ironweed thrives in zone 5 (hardy 5–8)
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 October 15
Bloom window
August – September
Peak bloom
August
Sun required
full sun
Mature height
72"
Spacing
36" apart
Type
perennial
How to plant New York Ironweed in zone 5
Plant in spring. Towering late-season pollinator plant; Chelsea-chop in June for shorter stems.
Pair with these for continuous bloom
New York Ironweed peaks in August. These companions keep your bed in color before and after.
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