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Showy Milkweed

Asclepias speciosa
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Asclepias speciosa (Showy Milkweed) — botanical photograph
Pl. 9C16 — Asclepias speciosa
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Overview

Showy Milkweed (Asclepias speciosa) is a perennial herb that thrives across a wide range of North American regions, from Alberta to California and southward into Texas. This plant is native to areas including Alberta, Arizona, British Columbia, and many more states and provinces. Showy Milkweed is known for its ornamental value, with large, showy clusters of pink to purple flowers blooming from June to August. Its light green, lance-shaped leaves and fluffy seed pods make it a distinctive addition to native gardens and prairie restorations. This milkweed species can grow up to 0.8 meters tall and prefers full sun to partial shade, thriving in moist to dry conditions with well-drained soil. It is adaptable to a pH range of 5 to 7, making it suitable for various garden settings. Showy Milkweed is not only ornamental but also edible, with parts such as flowers, leaves, roots, seeds, and shoots being harvestable throughout the growing season. However, caution is advised when handling the plant, as it contains latex, which can cause skin irritation in some individuals. Showy Milkweed is hardy in zones 3-9 and can be propagated through division or seed sowing. Its ability to thrive in diverse conditions and its ornamental and edible qualities make it a valuable plant for gardeners and conservationists alike. While it is not medicinal, it plays a crucial role in supporting local ecosystems by providing nectar for pollinators and serving as a host plant for monarch butterfly larvae.

Quick answers

What is Showy Milkweed?

Showy Milkweed (Asclepias speciosa) is a perennial herb that thrives across a wide range of North American regions, from Alberta to California and southward into Texas. This plant is native to areas including Alberta, Arizona, British Columbia, and many more states and provinces.

Growingconditions · propagation · uses
V

Cultivation

Showy Milkweed thrives in full to partial sun and prefers moist to dry conditions, making it adaptable for various garden settings. It grows best in light (sandy) or medium soils with a pH between 5 and 7. Hardy in zones 3-9, this perennial can be propagated through division or seed sowing. Harvest edible parts such as flowers, leaves, roots, seeds, and shoots throughout the growing season.
Light
Full sun, Partial sun/shade
Water
Dry, Moist
Soil
Light (sandy), Medium
Hardiness
3-9
Life cycle
Perennial
Habit
Forb/herb
Mature size
0.8 m tall
Soil pH
5–7
For first-time growers

How to grow Showy Milkweed for the first time

8steps

Start with Showy Milkweed as a simple, low-maintenance perennial for your garden.

  1. 1

    What you'll need

    Showy Milkweed seeds or young plants, a trowel, and mulch.

  2. 2

    Best time to plant

    Plant in spring after the last frost or in fall before the first freeze.

  3. 3

    Soil and container prep

    Choose a location with well-draining soil that's light (sandy) to medium. Ensure full sun to partial shade.

  4. 4

    Sowing or transplanting

    Direct sow seeds in early spring, covering them lightly. For transplants, buy young plants from a nursery.

  5. 5

    First two weeks

    Water regularly until established. Keep the soil moist but not waterlogged.

  6. 6

    Ongoing care

    Water when the top inch of soil is dry. Mulch to retain moisture and control weeds.

  7. 7

    Harvest or pruning

    Prune dead leaves and spent flowers to encourage new growth and a tidy appearance.

  8. 8

    Common mistakes

    Overwatering, planting in heavy clay soil, neglecting to provide enough sunlight.

VI

Edible & utility

Edible parts:FlowersLeavesRootSeedSeedpodShoots
Edible uses: Oil, Gum, Sweetener
Other uses:DyeFiberGumtextilesoilPollution
Contextrange · companions · related
VII

Distribution

26 native · 1 introduced
Distribution across0 continents· 26 native· 1 introduced
Broader regions
native:Alberta, Arizona, British Columbia, California, Colorado, Idaho, Illinois, Iowa, Kansas, Manitoba, Michigan, Minnesota, Montana, Nebraska, Nevada, New Mexico, North Dakota, Oklahoma, Oregon, Saskatchewan, South Dakota, Texas, Utah, Washington, Wisconsin, Wyoming
introduced:Baltic States
IX

Specimen gallery

1 image
Asclepias speciosa (Showy Milkweed) — botanical photograph
Showy Milkweed (Asclepias speciosa)
XI

Explore further

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