Zone 9 · Swamp Milkweed
Planting Swamp Milkweed in Zone 9
Asclepias incarnata
✅ Swamp Milkweed thrives in zone 9 (hardy 3–9)
Can I plant today?
⏳ Not the right window
Swamp Milkweed has a specific planting window in zone 9. Check back in spring.
Evaluated for April 27, 2026 ·
Zone's last frost
around February 15
Zone's first frost
around December 15
Bloom window
July – August
Peak bloom
July
Sun required
full sun
Mature height
48"
Spacing
24" apart
Type
perennial
How to plant Swamp Milkweed in zone 9
Plant in spring in moist soil. Monarch host plant; more garden-polite than common milkweed.
Pair with these for continuous bloom
Swamp Milkweed peaks in July. These companions keep your bed in color before and after.
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