How to Grow Butterfly Plant
Butterfly Plant
Asclepias species (commonly Asclepias incarnata or Asclepias tuberosa)
flowerButterfly plants, commonly called milkweed, are native flowering perennials known for their vibrant clusters of small, colorful flowers that attract monarch butterflies and other pollinators. These hardy plants are essential for monarch butterfly larvae development, as milkweed is their only host plant. They're drought-tolerant once established and require minimal maintenance.
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Example Butterfly Plant timeline · Pittsburgh, PA (Zone 6b)
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Plant Butterfly Plant
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 Butterfly Plant blooms
Mid-to-late summerBefore the first fall frost (≈ Nov 8)
Sample dates for Pittsburgh, PA. Sign up to get exact Butterfly Plant dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Zones 3-9, depending on species; most thrive in zones 4-8
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Seedling
2-4 weeksSmall green leaves emerge; plant is delicate and low-growing. Roots are developing below ground.
Keep soil consistently moist but not waterlogged. Provide bright light. Thin seedlings to proper spacing.
Vegetative Growth
4-8 weeksPlant develops more leaves and stems; foliage becomes fuller. Height increases significantly from base to mature size.
Water regularly during dry spells. Fertilize sparingly—milkweed prefers poor soil. Remove weeds to reduce competition.
Budding
2-3 weeksSmall flower buds form at stem tips, clustering in umbel formations. Buds are typically green transitioning to color.
Maintain consistent moisture. Do not fertilize heavily, which delays flowering. Watch for emerging monarch caterpillars on leaves.
Flowering
4-8 weeksVibrant flower clusters open in shades of pink, orange, red, or yellow depending on species. Flowers attract butterflies, bees, and other pollinators.
Deadhead spent flowers to encourage more blooms, or leave for seed development. Provide water during dry spells. Monitor for pests.
Seed Pod & Harvest
4-6 weeksFollicle pods develop after flowering, becoming plump and turning brown. Inside are flat seeds attached to silky hair-like structures (comas).
Allow pods to mature fully on plant. Collect pods when brown and papery. Dry indoors for seed storage. Leave some for self-seeding and wildlife.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Do not control—these are beneficial; they feed exclusively on milkweed. Plant more milkweed to support populations.
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Generally harmless; remove by hand if severe. Encourage natural predators like birds.
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Spray with water to dislodge. Use insecticidal soap if heavy infestation. Encourage ladybugs and parasitic wasps.
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Increase humidity with water spray. Use neem oil as last resort. Encourage beneficial predatory mites.
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Improve air circulation. Remove affected leaves. Avoid overhead watering. Apply fungicide only if severe.
Uses
Monarch Butterfly Host Plant
WildlifeMilkweed is the exclusive larval host plant for monarch butterflies (Danaus plexippus). Without milkweed, monarch caterpillars cannot survive, making this plant critical for monarch conservation and population recovery. [source]
Pollinator Support
WildlifeButterfly plants are excellent nectar sources for monarchs, swallowstails, bees, hummingbirds, and other pollinators. Their clustered flowers provide abundant food from mid-summer through fall. [source]
Traditional Medicine
MedicinalSeveral milkweed species have been used in traditional Native American and folk medicine for respiratory conditions, skin issues, and digestive health, though modern research is limited. [source]
Seed Fiber Craft
HouseholdThe silken fibers (comas) attached to milkweed seeds can be harvested and used for fiber art, filling, or craft projects. Historically, these fibers were explored as kapok replacement. [source]
Edible Shoots and Buds
CulinaryYoung shoots and unopened flower buds of certain milkweed species (particularly Asclepias incarnata and A. tuberosa) are edible when properly prepared by boiling in multiple water changes to remove latex compounds. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Allow seed pods to fully mature and turn brown (late summer to fall) before collecting. Cut entire pods and place in paper bag to dry indoors for 2-3 weeks. Extract seeds by opening dry pods; seeds are ready when completely dry and brown. Store in cool, dry location. For best germination, stratify seeds (expose to cold) for 30 days before spring planting.
Fun Facts
- 🌱 Monarch butterflies store toxic compounds (cardenolides) from milkweed latex in their bodies, which makes them poisonous to predators. Their distinctive orange-and-black coloring warns predators of this toxicity.
- 🌱 A single monarch caterpillar can consume an entire milkweed leaf in one day and will go through five growth stages (instars) before forming a chrysalis.
- 🌱 Milkweed got its name from the milky latex sap that oozes from broken stems and leaves; this sap contains alkaloid and cardenolide compounds that protect the plant from herbivores.
Gardening Terms
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