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PlantSnap
Plant Care
Tropical milkweed
(Asclepias curassavica)
Also Known As
Tropical milkweed, Bloodflower, Scarlet milkweed, Silkweed, Orange milkweed
About This Plant
Asclepias curassavica is a species of milkweed native to the Americas. It is commonly known as tropical milkweed, bloodflower, or scarlet milkweed. The plant is a herbaceous perennial that grows up to 1-3 feet (30-90 cm) tall and has thin, upright stems with lance-shaped leaves. The flowers are bright orange-red and bloom in clusters from early summer to fall, attracting butterflies and hummingbirds.
Plant Care Instructions
Outdoor Size Range
1-3 feet (30-90 cm)
Light Requirements
Asclepias curassavica requires full sun to partial shade. It needs at least 6 hours of direct sunlight per day to thrive.
Humidity Needs
Asclepias curassavica prefers moderate to high humidity levels. It can tolerate dry conditions but may require more frequent watering.
Fertilizing Schedule
Asclepias curassavica benefits from regular fertilization during the growing season. Use a balanced fertilizer every two weeks.
Pruning Guidelines
Pruning is not necessary for Asclepias curassavica, but it can be done to control the size and shape of the plant. Deadheading the flowers can also promote blooming.
Common Pests and Diseases
Common pests that can affect Asclepias curassavica include aphids, spider mites, and milkweed bugs. The plant can also be susceptible to fungal diseases like powdery mildew.
Indoor Size Range
Not suitable for indoor growth
Watering Schedule
The plant needs moderate watering. It should be watered when the top inch of soil is dry to the touch. Overwatering can cause root rot, so it's important to ensure proper drainage.
Temperature Range
The plant prefers warm temperatures between 65-85°F (18-29°C). It can tolerate some cold but is not frost-resistant.
Growing Season
Asclepias curassavica can be grown year-round in tropical climates. In cooler climates, it is best to plant in the spring after the last frost.
Growing Difficulty Level
Asclepias curassavica is relatively easy to grow and care for. It is a hardy plant that can adapt to different soil types and growing conditions. However, it can be toxic to pets and humans if ingested.
USDA Hardiness Zones
Asclepias curassavica is hardy in USDA zones 8-11.
Did You Know?
Asclepias curassavica is an important host plant for the monarch butterfly. The caterpillars feed on the leaves, and the flowers provide nectar for adult butterflies. Planting milkweed like Asclepias curassavica in your garden can help support monarch butterfly populations.
