How to Grow Bloodflower
iNaturalist
Bloodflower
Asclepias curassavica
flowerBloodflower is a tropical perennial shrub known for its striking two-toned orange and red flowers that attract monarchs and other pollinators. Native to tropical Americas, it produces distinctive elongated seed pods and thrives in warm climates. The plant is highly valued by gardeners who want to support milkweed-dependent butterfly species.
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Example Bloodflower timeline · Pittsburgh, PA (Zone 6b)
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Plant Bloodflower
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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First Bloodflower blooms
Around Jun 16≈ 60 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Bloodflower dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 9b-11; can be grown as an annual in cooler zones or indoors
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Seedling
3-4 weeksTiny emerged seedlings with cotyledons and first true leaves; delicate and slow-growing initially
Keep soil consistently moist but not waterlogged. Provide bright light. Thin seedlings to prevent damping-off. Start seeds indoors 6-8 weeks before last frost.
Vegetative Growth
4-6 weeksPlant develops multiple stems and elongated lanceolate leaves; grows into a bushy mound without flowers
Water regularly and fertilize every 2-3 weeks with balanced fertilizer. Pinch back shoot tips to encourage branching. Gradually acclimate to outdoor conditions if started indoors.
Budding
2-3 weeksFlower buds appear at stem tips; plant reaches 2-3 feet tall; distinctive orange-red coloration begins to show in buds
Continue regular watering and fertilizing. Support taller stems if needed. Reduce nitrogen fertilizer to encourage flowering over leaf growth.
Flowering
3-4 months or until frostBrilliant clustered flowers with orange outer petals and red inner crown appear; flowers attract monarchs and other butterflies; blooms continue for months
Deadhead spent flower clusters to encourage more blooms, though leaving some allows seed pod formation. Continue watering and light fertilizing. Watch for caterpillars—allow them to feed as this is essential for monarch development.
Seed Pod Development & Harvest
4-8 weeks per podLong, slender, pointed seed pods develop where flowers were; pods turn from green to brown; seeds mature inside with silky plumes attached
Allow some pods to mature fully on the plant for self-seeding or seed collection. Cut mature brown pods before they split open. Dry indoors for 1-2 weeks before opening. Save seeds in cool, dry place.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Allow to feed freely—this is beneficial, not a pest problem. Tolerate leaf damage as this supports endangered monarchs.
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Spray with water to dislodge; use insecticidal soap or neem oil if severe. Increase humidity.
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Inspect regularly and remove by hand or with pruning. Use horticultural oil spray in dormant season.
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Spray with water or insecticidal soap. Apply neem oil every 7-10 days if infestation persists.
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Use yellow sticky traps. Spray with neem oil or insecticidal soap weekly.
Uses
Monarch Butterfly Support
WildlifeBloodflower is a critical host plant for monarch butterfly caterpillars and a rich nectar source for adult monarchs and other pollinators. Planting bloodflower directly supports monarch migration and population survival. [source]
Ornamental Edible Garnish
CulinaryThe distinctive flowers can be used as edible garnishes for salads and desserts, adding striking visual appeal and a mild, slightly bitter flavor. [source]
Traditional Herbal Medicine
MedicinalBloodflower has been used in traditional Caribbean and Latin American medicine to treat various ailments including warts, respiratory issues, and skin conditions, though scientific validation is limited. [source]
Cut Flower Arrangements
HouseholdThe long-lasting flower clusters and distinctive seed pods make excellent additions to fresh and dried flower arrangements for home décor. [source]
Dried Seed Pod Crafts
CraftMature seed pods with their silky seeds create beautiful natural decorative elements for dried arrangements, wreaths, and craft projects. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Harvest seed pods when they turn brown but before they split open naturally. Cut the entire pod with scissors and allow to dry indoors in a paper bag for 1-2 weeks. Once dry, gently open and collect the seeds with their silky parachutes. Plant fresh seeds immediately or store in cool, dry conditions. For continuous flowering, deadhead spent blooms regularly.
Fun Facts
- 🌱 Bloodflower is a milkweed species, and monarch caterpillars sequester toxins from the plant to make themselves poisonous to predators—a brilliant evolutionary strategy.
- 🌱 The plant produces a milky latex sap when stems are broken, which gives the milkweed family its common name and has been used traditionally in folk medicine.
- 🌱 Bloodflower readily self-seeds in warm climates and can become naturalized; in cooler zones, it's easily grown as an annual or brought indoors for winter survival.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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