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Grow the majestic Calotropis gigantea, also known as Giant Milkweed or Crown Flower, a tropical shrub famous for its large, waxy, star-shaped flowers and hardy nature. This fast-growing perennial is drought-tolerant and often used in ornamental landscaping, traditional medicine, and as a host plant for monarch butterflies.
🌿 Plant Type: Perennial tropical shrub
🌞 Light: Full sun
🌱 Sowing Time: Spring or early summer
⏳ Germination: 2–3 weeks
🌼 Bloom Time: Summer to fall
🌿 Special Uses: Ornamental, butterfly host plant, medicinal
Requires well-drained soil and warm climates to thrive. Perfect for tropical and subtropical gardens.
✓ Adds garden color with an easy seed-starting option
✓ Useful for beds, borders, containers, or mixed plantings
✓ A practical choice for seasonal flower displays
✓ Pairs well with other annual and perennial garden favorites
✓ Good for gardeners building a more colorful outdoor space
Sow Giant Milkweed in spring, fall where it can receive full sun. Keep the seedbed evenly moist until germination, usually 10-21 days.
Grow plants to about 24-48 in. and plan for blooms in about 90-120 days.
Best suited to USDA zones 3A-9A. Adjust sowing time for your local frost dates and summer heat.
Tips for sowing, growing and enjoying your next seed order.
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