Zone 8 · Cardinal Flower
Planting Cardinal Flower in Zone 8
Lobelia cardinalis
✅ Cardinal Flower thrives in zone 8 (hardy 3–9)
Can I plant today?
✅ Safe to plant Cardinal Flower outside
Last frost has passed. Plant in spring in consistently moist soil — great near ponds or rain gardens. The hummingbird flower.
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
part sun, shade
Mature height
36"
Spacing
12" apart
Type
perennial
How to plant Cardinal Flower in zone 8
Plant in spring in consistently moist soil — great near ponds or rain gardens. The hummingbird flower.
Pair with these for continuous bloom
Cardinal Flower peaks in August. These companions keep your bed in color before and after.
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