Purple Silkweed
Asclepias halliifam. Asclepiadaceae
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Pl. 69A5 — Asclepias hallii
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IOverview
Overview
Purple Silkweed (Asclepias hallii) is a perennial forb or herb native to the southwestern United States, specifically Arizona, Colorado, Nevada, New Mexico, Utah, and Wyoming. This plant thrives in full to partial sun and prefers well-drained soils that are light (sandy) to medium in texture. It can tolerate both dry and moist conditions and is hardy in zones 3-7. Known for its edible parts—flowers, leaves, seeds, seedpods, and shoots—Purple Silkweed has been utilized by local communities. One distinctive feature of this plant is its purple flowers, which add a vibrant touch to the landscape while also serving as an important source of nectar for pollinators.
Quick answers
What is Purple Silkweed?
Purple Silkweed (Asclepias hallii) is a perennial forb or herb native to the southwestern United States, specifically Arizona, Colorado, Nevada, New Mexico, Utah, and Wyoming. This plant thrives in full to partial sun and prefers well-drained soils that are light (sandy) to medium in texture.
Growingconditions · propagation · uses
VCultivation
Cultivation
Purple Silkweed thrives in full to partial sun and prefers dry to moist conditions. It grows well in light (sandy) to medium soil types. Hardy from zones 3-7, this perennial requires minimal watering once established. Propagate via seeds or division. Harvest edible parts such as flowers, leaves, seedpods, and shoots for culinary use.
Light
Full sun, Partial sun/shade
Water
Dry, Moist
Soil
Light (sandy), Medium
Hardiness
3-7
Life cycle
Perennial
Habit
Forb/herb
Mature size
1.0 m tall
For first-time growers
How to grow Purple Silkweed for the first time
8steps
Purple Silkweed is a low-maintenance perennial that's perfect for beginners looking to add a drought-tolerant plant to their garden.
- 1
What you'll need
Seeds or small plants, a trowel, and mulch.
- 2
Best time to plant
Plant in spring after the last frost or in fall before the first freeze.
- 3
Soil and container prep
Choose well-draining soil with a pH between 6.0 and 7.5; ensure containers have drainage holes.
- 4
Sowing or transplanting
Direct sow seeds in the ground after danger of frost has passed, or start indoors 4-6 weeks before planting outdoors.
- 5
First two weeks
Water thoroughly once a week to help establish roots; avoid overwatering.
- 6
Ongoing care
Provide full sun and water only when the soil is dry. Prune dead or damaged parts as needed.
- 7
Harvest or pruning
Prune in late winter before new growth begins to encourage a bushier plant.
- 8
Common mistakes
Overwatering, planting in heavy soil, and not providing enough sunlight are common pitfalls for beginners.
VIEdible & utility
Edible & utility
Edible parts:FlowersLeavesSeedSeedpodShoots
Edible uses: Oil, Gum, Sweetener
Other uses:DyeFiberGumtextilesoilPollution
Contextrange · companions · related
VIIDistribution
6 native · 0 introduced
Distribution
6 native · 0 introducedDistribution across0 continents· 6 native
Broader regions
native:Colorado, Nevada, New Mexico, Utah, Wyoming, Arizona
IXSpecimen gallery
1 image
Specimen gallery
1 imageXSee also
8 related
See also
8 relatedPlants you might compare or use together — scored by shared family (Asclepiadaceae), common use cases, and growing requirements.
same family · Asclepiadaceae
Botanical relatives — often share phytochemistry + growing needs.
XI
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Companion planting
Compare with similar plants
Growing zone
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Back to the cataloguePlant id · 69a5b81f-bcc7-497c-993e-dc203389b503
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