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Native Wildflower · Easy

How to Grow Purple Milkweed

Asclepias purpurascens

Your complete guide to growing Purple Milkweed.

☀SunFull sun to partial shade (4-6+ hours)
💧WaterDrought tolerant once established; moderate water during establishment period
🗺Zones3–8
📏Height2-3 feet
Purple Milkweed📷 Wikimedia Commons

When to Plant Purple Milkweed

Planting windows vary by USDA hardiness zone. Look up yours by ZIP code.

ZoneStart IndoorsDirect SowHarvest
Zone 3 — May – July —
Zone 4 — April – June —
Zone 5 — April – June —
Zone 6 — April – June —
Zone 7 — March – May —
Zone 8 — March – May —

Companion Plants for Purple Milkweed

✓ Good companions

Black-Eyed Susan

Similar growing conditions and blooming periods attract diverse pollinators

Goldenrod

Extends pollinator season with late summer blooms, attracts predatory insects

Little Bluestem Grass

Provides structural support and creates natural prairie habitat

Native Asters

Sequential blooming provides continuous nectar source for monarch butterflies

Prairie Dropseed

Ornamental grass that complements without competing for nutrients

Purple Coneflower

Complementary heights and colors, shared preference for well-drained soil

Wild Bergamot

Attracts beneficial insects and provides pest deterrent properties

Yarrow

Attracts beneficial predatory insects that control milkweed pests

✗ Keep away from

Black Walnut

Produces juglone which is toxic to milkweed and inhibits growth

Crown Vetch

Invasive legume that fixes nitrogen, disrupting milkweed's preferred low-nitrogen soil

Mint

Aggressive spreading habit can overwhelm and crowd out milkweed

Notes from the garden

A greener inbox, occasionally.

Seasonal planting ideas, useful tips and a little inspiration. No weeds.