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Plant profile · Austin & Hill Country
Tropical Milkweed (Asclepias curassavica)
(c) Jared Shorma, some rights reserved (CC BY) · iNaturalist

Tropical Milkweed

Asclepias curassavica

Also called Mexican Butterfly Weed

Hills guide picktoxic

Tropical Milkweed is a perennial from the Village of the Hills planting guide that grows 3–4 ft tall and 1–2 ft wide. It wants full sun or part shade and low water. Deer rarely browse it.

Toxic — pets, livestock. Cardiac glycosides. Also disrupts monarch migration and concentrates OE parasite — Texas native plant groups campaign against planting it.

Will it grow in your yard?

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From our guide

Village of the Hills

Upright stems with orange-and-yellow flower clusters over a very long season.

Why it works here

Monarch larval host that blooms when native milkweeds have gone dormant, and it is the one milkweed reliably available in nurseries.

Watch out

Cut it to the ground each fall. Left standing through winter it harbors a monarch parasite and disrupts migration timing. Not native.

The facts

5 sources
Type
Perennial
Sun
Full sun to part shade (3+ hrs)
Water
Low
Height
3–4 ft
Spread
1–2 ft
Foliage
Deciduous
Deer
High — deer rarely browse it. Milky sap is toxic; deer avoid it.
Size, sun, water and foliage from the Village of the Hills guide; the rest resolved across sources.

Where it grows

55 occurrence records in Central Texas (GBIF).

Can you buy it?

In the Village of the Hills guide, but not on the grower stock lists we read yet. Ask a native-plant nursery.