Skip to main content

Green Comet Milkweed

Asclepias viridiflora

Last reviewed: September 2026

Green comet milkweed is a low, clump-forming prairie forb with clusters of greenish flowers that bloom from June through August. It favors full sun and dry, well-drained soils typical of prairies, glades, and rocky open ground.

Green Comet Milkweed (Asclepias viridiflora)
Photo: (c) Sam Kieschnick, some rights reserved (CC BY)

Green Comet Milkweed is toxic to dogs and cats.

Listed as toxic by the ASPCA Animal Poison Control Center (opens in new tab) (last reviewed 2026-05-21). If your pet has been exposed, call the ASPCA Animal Poison Control Center at (888) 426-4435and your veterinarian's emergency line.

Pollinator Patch flags toxic plants so you can choose a pet-safe native alternative for your yard.

Light

full sun

Water

low

Size

12"–36" H × 6"–18" W

Bloom

Jun, Jul, Aug

Native to

AL, AR, AZ, CO and 33 more states

Pollinators

bees, butterflies, beetles

Before you buy

Your city may pay you to plant this

Cities and water utilities offer rebates for replacing lawn with native and water-wise plants. We track 452 programs across 44 states, each with a link to the provider and the date we last checked it.

Find rebates in your area

Green comet milkweed is a compact native perennial with small, inconspicuous greenish flowers that bloom through summer. It forms neat clumps and tolerates drought well once established, making it a low-maintenance choice for sunny areas.

Growing Green Comet Milkweed

Grow Green Comet Milkweed in full sun and low water. Mature plants reach 12 to 36 inches tall and spread 6 to 18 inches wide. Expect low maintenance to keep it looking intentional in a front yard.

In an HOA neighborhood

Green Comet Milkweed is an HOA-friendly choice. Maintenance level: low. Tidiness: 4 out of 5.

Works well in: front yard, foundation, street edge, mid zone.

  • Flowers are very small and may not provide obvious ornamental impact

Wildlife value

Host plant for monarch butterfly, milkweed tussock moth.

This milkweed species supports monarch butterflies as a host plant for caterpillars. The flowers attract various native bees, butterflies, and beneficial beetles throughout the summer months.

Common questions

When does green comet milkweed bloom?
Asclepias viridiflora typically flowers from June through August, with small greenish umbels clustered along the stem.
What pollinators visit green comet milkweed?
Bees, butterflies, and beetles are the main visitors, drawn to the nectar produced by its greenish flower clusters.
What growing conditions suit this plant best?
It does best in full sun with low to medium water, in well-drained, often rocky or sandy soil that does not stay wet.
What kind of habitat does green comet milkweed grow in?
It is typically found in dry prairies, open woodlands, glades, and rocky hillsides where competition from taller vegetation is limited.
Is Green Comet Milkweed toxic to dogs?
Yes. Green Comet Milkweed is listed as toxic to dogs by the ASPCA Animal Poison Control Center (aspca.org). If your pet has been exposed, call the ASPCA Animal Poison Control Center at (888) 426-4435.
Is Green Comet Milkweed toxic to cats?
Yes. Green Comet Milkweed is listed as toxic to cats by the ASPCA Animal Poison Control Center (aspca.org). If your cat has been exposed, call the ASPCA Animal Poison Control Center at (888) 426-4435.
Is Green Comet Milkweed HOA-friendly?
Green Comet Milkweed is generally an HOA-friendly choice in the right placement, with low maintenance.

These answers were drafted with an AI model from this plant's data. Verify care details with a local expert.

Native range data from vouchered herbarium specimen records and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.

If something looks wrong

Common plant problems, and what to check first

These come up on almost any plant. Each guide lists the likely causes in the order they are worth ruling out, with one thing to check before you act on any of them, and links to the source it came from.

See all plant problem guides

Pollinator Patch flags toxic plants like Green Comet Milkweed and shows pet-safe natives for your ecoregion instead.

Planning a bed around it? Start a free plan with this plant

Not sure where to start? Take the 2-minute yard quiz