Common Milkweed
Asclepias syriaca
Essentials
At a Glance
Plant Type
Perennial
Height
48 inches
Width
24 inches
Light
Full Sun, Partial Sun
Zones
4, 5, 6, 7, 8, 9
Water
Moderate
Humidity
Average
Lifespan
Perennial
Native To
North America
Toxicity
Toxic to humans and animals if ingested
The Story
Plant Bio
A native perennial known for its milkweed characteristic and ability to attract pollinators. Host plant for the larvae of the monarch butterfly.
Bloom Period:
Uses & Benefits:
Marketplace
Where to Buy
Shipping costs Year-round shipping Free shipping
Planting
How to Grow
- Tuck seeds into well-draining soil in early spring for best germination.
- Mist cuttings lightly every few days to maintain humidity and root in 4–6 weeks.
- Ensure full sun exposure for optimal growth and flowering.
- Water regularly but avoid waterlogging to prevent root rot.
- Apply a balanced fertilizer during the growing season to promote healthy growth.
- Divide mature plants in early spring or fall to propagate new plants.
Pro Tip
Use fresh seeds and maintain consistent moisture for higher germination success.
Keep It Thriving
Care Guide
Do
- Water deeply during dry spells 🌱
- Prune dead or damaged stems in late winter
- Apply organic mulch to conserve moisture
- Use natural pest repellents when needed
Don't
- Overwater to avoid root rot ❌
- Don’t disturb roots during flowering
- Avoid excessive fertilization which can reduce blooms
- Never use chemical herbicides near plants
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Deadhead | ||||||||||||
| Pest Check | ||||||||||||
| Plant | ||||||||||||
| Propagate | ||||||||||||
| Spring Cleanup |
Watch Out For
Pests & Diseases
Common Pests
Common Diseases
In the Garden
Landscape Uses & Companions
Landscape Uses
Companion Plants
Multiply
Propagation Methods
Good to Know
Common Questions
Common Milkweed questions
What zones can Common Milkweed grow in?
Common Milkweed is hardy in USDA Zones 4–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Common Milkweed deer resistant?
Not reliably. Deer may browse Common Milkweed, especially tender spring growth — plan on repellents or fencing where pressure is high.
When does Common Milkweed bloom?
Common Milkweed typically blooms in mid-summer through late summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Common Milkweed need full sun?
Common Milkweed does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
Is Common Milkweed drought tolerant?
Yes — once established (usually after the first full season), Common Milkweed handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.
More Asclepias to compare
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Asclepias tuberosa
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Butterfly Weed Gay Butterflies Milkweed
Asclepias tuberosa 'Gay Butterflies'
Butterfly Weed
Asclepias tuberosa 'Deluxe Butterfly Garden'
Hello Yellow Butterfly Weed
Asclepias tuberosa 'Hello Yellow'
Butterfly Milkweed
Asclepias x hybrida
Keep exploring
Explore the genus
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Grow Common Milkweed with confidence
See it in a design of your actual yard, get zone-matched care reminders, and track it season by season in your garden journal.
