Zone 7 · Swamp Milkweed
Planting Swamp Milkweed in Zone 7
Asclepias incarnata
✅ Swamp Milkweed thrives in zone 7 (hardy 3–9)
Can I plant today?
✅ Safe to plant Swamp Milkweed outside
Last frost has passed. Plant in spring in moist soil. Monarch host plant; more garden-polite than common milkweed.
Evaluated for April 27, 2026 ·
Zone's last frost
around April 15
Zone's first frost
around November 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 7
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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