Photo: no rights reservedCC0 1.0via iNaturalist
Showy Milkweed Plant Care
Asclepias speciosa Torr.
Updated · Sources · How we source care data
Asclepias speciosa is a milky-sapped perennial plant in the dogbane family (Apocynaceae), known commonly as the showy milkweed and is found in the western half of North America.
Every 7–10 days
Full sun
60–85°F
40–60%
At a glance
How do you care for Showy Milkweed?
Water Showy Milkweed every 7–10 days, letting the top layer of soil dry out between waterings, and give it full sun. It prefers temperatures of 60–85°F (16–29°C) and 40–60% humidity. Fertilize it every 6 months during the growing season. The ASPCA lists it as toxic to cats and dogs, so keep it out of reach of pets.
Where Is the Showy Milkweed Native To?
What Is the Showy Milkweed?
Showy Milkweed (Asclepias speciosa) belongs to the Apocynaceae family within the Asclepias genus. Showy Milkweed is native to the western half of North America.
Showy Milkweed displays an upright, clumping perennial growth habit, reaching up to 3 ft tall with a spread of approximately 2 ft. Showy Milkweed produces clusters of small, colorful flowers in shades of pink, orange, or yellow.
Leaf size: approximately 6 inches.
How Often Should You Water a Showy Milkweed?
Asclepias speciosa requires watering every 7–10 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.
Watering Frequency
Every 7–10 days
Let soil partially dry between waterings
What Light Does the Showy Milkweed Need?
Showy Milkweed thrives in full sun.
Light Requirement
Full sun
What Temperature and Humidity Does the Showy Milkweed Prefer?
Asclepias speciosa grows best at temperatures of 60–85°F. Showy Milkweed prefers humidity levels of 40–60%.
Temperature
60–85°F
Humidity
40–60%
What Soil Mix Works Best for a Showy Milkweed?
Well-draining sandy loam with some organic matter. Good drainage is essential for Showy Milkweed to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Showy Milkweed?
Feed Showy Milkweed every 6 months during the growing season (spring and summer) with a balanced fertilizer diluted to the strength on the label.
Pause feeding in autumn and winter, when growth slows, and never fertilize dry soil — water first.
Fertilizing
Every 6 months
During the growing season
The PlantoScan app can remind you when to water and when to fertilize each plant.
How Do You Repot a Showy Milkweed?
Repot every 2-3 years in early spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.
How Do You Propagate a Showy Milkweed?
Showy Milkweed can be propagated through seeds, stem cuttings. Similar propagation techniques also apply to butterfly weed plant care, which shares the same genus.
Is the Showy Milkweed Toxic to Pets and Children?
Toxic to cats and dogs
Source: ASPCA Animal Poison Control Center plant list, which covers Asclepias species (which includes Showy Milkweed). View the ASPCA entry
Toxic to humans and pets if ingested
This is a general caution, not veterinary or medical advice. If your pet ate a plant, contact your vet or animal poison control.
See all plants toxic to cats and plants toxic to dogs.
What Pests and Diseases Affect the Showy Milkweed?
Showy Milkweed is susceptible to aphids, milkweed bugs, spider mites. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.
Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.
What USDA Hardiness Zone Does the Showy Milkweed Need?
Showy Milkweed grows outdoors in USDA Zone 3 – 9. It survives winters down to planting zone 3a. Showy Milkweed is native to the western half of North America.
Hardiness Zone
Zone 3 – 9
Keep exploring plants
Showy Milkweed is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.
It belongs to the Asclepias genus — compare its care with other Asclepias species on PlantoScan.
Asclepias is part of the Apocynaceae plant family — browse all Apocynaceae genera and species.
Showy Milkweed thrives in bright light and direct sun — see other bright-light plants.
Related Plant Care Guides
Closely related plants with similar care requirements:
Sources
- Scientific name & taxonomy: Asclepias speciosa Torr., family Apocynaceae (first published in Ann. Lyceum Nat. Hist. New York 2: 218 (1827)) — World Flora Online record, IPNI name record, Wikidata.
- Pet toxicity: The ASPCA lists Asclepias species (which includes Showy Milkweed) as toxic to cats and dogs. Source: ASPCA Toxic and Non-Toxic Plant List.
- Photo: Public domain, CC0 1.0, iNaturalist — original.
- Hardiness zone: USDA Zone 3 – 9, estimated from the plant's typical growing conditions.
- Care values(watering, light, temperature, humidity, soil, fertilizing): PlantoScan's plant database, filtered by automatic plausibility checks — values that fail them are hidden. How we source and check plant data.
Spotted a mistake? Email info@upvision.media with the page link — we check and correct reported errors.
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