narrowleaf milkweed
Asclepias fascicularis
Essentials
At a Glance
Plant Type
Perennial
Height
30 inches
Width
18 inches
Light
Full Sun, Partial Sun
Zones
5, 6, 7, 8, 9
Water
Moderate
Humidity
Average
Lifespan
Perennial
Native To
North America
Toxicity
Toxic to pets and humans if ingested
The Story
Plant Bio
Asclepias fascicularis, commonly known as narrowleaf milkweed, is a native perennial that provides habitat and food for various pollinators. It is particularly favored for its role in supporting monarch butterfly populations.
Bloom Period:
Uses & Benefits:
Marketplace
Where to Buy
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Planting
How to Grow
- Tuck seeds into well-draining soil in early spring for best germination.
- Mist cuttings regularly to maintain humidity and encourage root growth.
- Transplant seedlings when they are strong enough, typically after the last frost.
- Mulch around plants to retain moisture and suppress weeds.
- Fertilize lightly in spring with a balanced organic fertilizer.
- Prune after flowering to promote bushier growth and remove dead stems.
Pro Tip
Use native soil and full sun for vigorous growth and abundant flowering.
Keep It Thriving
Care Guide
Do
- Water deeply during dry spells 🌱
- Deadhead spent flowers to encourage continuous blooming
- Mulch to conserve moisture and regulate soil temperature
Don't
- Avoid overwatering to prevent root rot ❌
- Don’t disturb roots during flowering
- Refrain from using chemical pesticides that harm pollinators
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pest Check | ||||||||||||
| 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
narrowleaf milkweed questions
What zones can narrowleaf milkweed grow in?
narrowleaf milkweed is hardy in USDA Zones 5–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is narrowleaf milkweed deer resistant?
Yes — narrowleaf milkweed is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does narrowleaf milkweed bloom?
narrowleaf milkweed typically blooms in summer through early summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does narrowleaf milkweed need full sun?
narrowleaf milkweed does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
Is narrowleaf milkweed drought tolerant?
Yes — once established (usually after the first full season), narrowleaf milkweed handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.
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Butterfly Milkweed
Asclepias x hybrida
Keep exploring
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Grow narrowleaf 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.
