Common Milkweed
Asclepias syriaca / tuberosa
Family Apocynaceae
No milkweed, no monarchs — the entire migration depends on this one genus, and Common Milkweed is its flagship. The domed summer blooms pour out a grape-soda fragrance most people have never stood close enough to notice, while the leaves raise the next generation of butterflies.
There's a form for every garden — tidy orange tuberosa for front beds, moisture-loving incarnata for rain gardens, fragrant syriaca where a wild patch can roam — all sun-loving, drought-savvy, and ignored by deer. Its sap keeps it admired, not eaten. Chewed leaves mean it's working. Plant the mission.
Full Sun
Low water
Fast growth
Deer-resistant
Native to North America
Attracts butterflies
Attracts bees
From the print shop
Growing common milkweed? Hang it.
Our Plant Library collection carries common milkweed — Asclepias syriaca, print Nº 302, “Common Milkweed.”
526 designsfrom $12.99white or black backgroundmatte poster, unframed
Will it thrive where you are?
Enter your ZIP — we look up your USDA hardiness zone (2023 map) and check it against what common milkweed actually needs.
Hardy inZones 3-9Common Milkweed · Common problems
Common common milkweed problems
Pests
2 problems on file
- Oleander Aphids (orange — blast, don't spray; monarch cats share the plant)
- Milkweed Beetles (harmless natives)
Diseases
1 problem on file
- Few
Common Milkweed · Growing & propagation
Growing common milkweed
- Light
- Full Sun
- Water
- Low
Tuberosa VERY low
Soil- Any
Tuberosa demands drainage · pH 5.5 - 7.5
Fertilizer- None
Pruning- Spring (leave winter stems
Stem-nesting bees use them) — Syriaca: give it a patch to run or mow the edges. Tuberosa (butterfly weed): never move it — taproot.
Spacing- 18-24 in
Syriaca RUNS; tuberosa clumps
How to plant & propagate common milkweed
- Propagate
- Division or seed
Common Milkweed · Seasonal care & spray guidance
The common milkweed growing playbook
When to spray common milkweed
Growing season. NEVER insecticide — the entire point is caterpillars eating it.
Common Milkweed · Calculators & field guides
A little help in the garden.
Common Milkweed · Yearly calendar
The common milkweed year, month by month
Jan
PruneDecember to May
BloomPruneBloomJune to August
PruneDecember to May
What each band means
- Bloom — flowers open — pollinators working, frost on blossoms is the danger.
- Prune — shape it now — cuts heal cleanly and structure is visible.
These are the species' typical months — expect them a few weeks earlier in warm zones and later in cold ones. Watch the plant, not just the calendar.
Common Milkweed · Ecology & uses
Ecology & uses
Asclepias syriaca / tuberosa
Common Milkweed in the garden system
- Herbaceous layer perennial
- Nectary/insectary
- Hosts Monarch butterfly (its ONLY host); also queen butterfly
- Attracts
- Butterflies, Bees
Habitat- Wetland
Moisture- Wetland / wet-tolerant
- Deer
- Resistant
A safer unfenced choice
- Origin
- Native to North America
What common milkweed is grown for
⚠ Toxic if eatenSap toxic — that's the monarch's defense; not a snacking plant
Use- Monarch nursery
- Use
- Native beds
- Use
- Grape-soda scent
Edibility, identification, and traditional-use notes here are general reference — not medical or veterinary advice, and not a claim that any plant treats or prevents anything. Medicinal ratings record how strongly a plant features in herbal tradition, nothing more. Never eat or dose a plant you have not positively identified. More on how to use this library.
Common Milkweed · Varieties & cultivars
Choosing a common milkweed variety
A. tuberosa (orange, tidy, clay-tolerant 'Butterfly Weed'); A. incarnata 'Ice Ballet' (swamp, pink, garden-mannered); syriaca (the wild patch)
Sources & plant identity
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Common Milkweed
Asclepias syriaca / tuberosa
The plant, at a glance.
- Botanical name
- Asclepias syriaca / tuberosa
- Plant family
- Apocynaceae
- Growth habit
- Perennial
- Origin
- Native to North America
- USDA plant symbol
- ASSY
- Invasive risk
- Low
Hardiness, size and timing vary with your cultivar, soil and climate.
Rooted in research.
University extension research, brought together with hands-on growing experience at Story Thyme Farms.
Questions
Common Milkweed questions, answered straight.
Do deer eat common milkweed?
Rarely — common milkweed is considered deer-resistant, which makes it one of the safer unfenced choices in deer country. Hungry deer in a hard winter test every rule, but it's a low-risk pick.
Is common milkweed safe for kids and pets?
No — treat it as toxic if eaten. Sap toxic — that's the monarch's defense; not a snacking plant Site it accordingly if children or pets roam the garden. This is general reference, not medical or veterinary advice — call a vet or poison control if something has actually been eaten.
How do you propagate common milkweed?
Division or seed.
Elsewhere
Where common milkweed sits in the library.
Ironweed
Cup Plant
Helen's Flower (Sneezeweed)
Turtlehead