Asclepias Species, Zizotes Milkweed, Longhorn Milkweed, Primrose Milkweed, Side-cluster Milkweed

Asclepiasoenotheroides

Family
Apocynaceae (a-pos-ih-NAY-see-ee)
Genus
Asclepias (ass-KLE-pee-us)
Species
oenotheroides (ee-no-ther-OY-deez)
Synonym
Asclepias brevicornu
Asclepias lindheimeri
Asclepias longicornu
Podostemma australe
Podostemma lindheimeri
Sun Exposure
Full Sun
Sun to Partial Shade
Foliage
Herbaceous
Height
12-18 in. (30-45 cm)
Spacing
15-18 in. (38-45 cm)
Hardiness
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
USDA Zone 9a: to -6.6 °C (20 °F)
USDA Zone 9b: to -3.8 °C (25 °F)
Danger
Parts of plant are poisonous if ingested
Bloom Color
Pale Yellow
White/Near White
Bloom Time
Late Spring/Early Summer
Other Details
Category
Perennials
Water Requirements
Average Water Needs; Water regularly; do not overwater
Foliage Color
Where to Grow
Bloom Characteristics
This plant is attractive to bees, butterflies and/or birds
Bloom Size
Other details
Soil pH requirements
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
Patent Information
Non-patented
Propagation Methods
From seed; direct sow outdoors in fall
Direct sow as soon as the ground can be worked
Seed Collecting
Allow seedheads to dry on plants; remove and collect seeds
Properly cleaned, seed can be successfully stored
Regional

This plant is said to grow outdoors in the following regions:

Chicago, Illinois

Austin, Texas

Brownsville, Texas

Canyon, Texas

Corpus Christi, Texas

Harlingen, Texas

Los Fresnos, Texas

Magnolia, Texas

Midland, Texas

Rio Frio, Texas

Round Rock, Texas

Chester, Virginia

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Gardener's Notes:

4
positives
1
neutral
0
negative
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A
Chester, VA (Zone 7b) | July 2022 | positive

I grew a few of these from seed in 2021 and most of them came back this year. Also I am in Chester, Virginia.

A
Round Rock, TX | June 2022 | positive

Zizotes milkweed, while not the most showy of the milkweeds, is one of the easier milkweeds to grow and one of the best for monarch as it...Read More

W
Fuquay Varina, NC | December 2017 | positive

I bought some seeds a few months ago and planted three of the seeds in a heated planting tray. All three of the seeds germinated within t...Read More

D
Los Fresnos, TX (Zone 10a) | July 2008 | positive

Zizotes Milkweed is a great plant for a butterfly garden or just a decorative garden. This plant produces seed pods which contain many se...Read More

F
Josephine, Arlington, TX (Zone 8a) | November 2006 | neutral

Zizotes Milkweed, Asclepias oenotheroides, is native to Texas and other States.

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