Tropical Milkweed Seeds
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Key Features:
- Classic Monarch Host Plant: The essential food source for Monarch caterpillars, critical for supporting the declining Monarch butterfly population.
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Stunning Red & Yellow Bicolor: Vibrant red petals with a bright yellow central crown, creating a striking, two-tone display.
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Attracts Pollinators: In addition to Monarchs, attracts bees, hummingbirds, and other butterflies to your garden.
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Heat & Drought Tolerant: Thrives in hot US summer conditions (Zones 3-11) and handles dry spells well once established.
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Long Bloom Season: Flowers continuously from late spring until the first frost, providing a constant food source for butterflies.
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Self-Seeding Annual/Perennial:: In cold climates, grow as an annual; in warm climates (Zones 8-11), it acts as a perennial. Self-seeds readily.
Add a stunning red and yellow display to your butterfly garden with our classic Tropical Milkweed seeds.
This iconic variety produces clusters of vibrant red petals with a bright yellow central crown, creating a striking two-tone effect. It is most famously known as a critical host plant for the Monarch butterfly – caterpillars feed exclusively on milkweed leaves. By planting this, you are directly helping to support the declining Monarch population.
Beyond its ecological importance, Tropical Milkweed is a beautiful garden plant. It blooms continuously from late spring until the first frost, providing a long-lasting display of color and serving as a nectar source for bees, hummingbirds, and other butterflies.
How to Plant – Spacing & Depth:
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Seed Depth: 1/4 inch (6mm). Cover lightly with soil.
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Germination Temperature: 65-75°F (18-24°C). Expect seedlings in 14-21 days.
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Plant Spacing:
For dense butterfly patches: 12 to 15 inches (30-38 cm) apart.
For best airflow & larger plants: 18 to 24 inches (45-60 cm) apart. Rows: Space rows 24 to 30 inches (60-75 cm) apart.
- Sunlight: Full sun (6-8 hours of direct sun is essential for best bloom production).
How to Grow:
- Cold Stratification (Recommended for best germination): Mix seeds with damp sand or vermiculite in a sealed bag. Refrigerate for 30 days before planting.
- Direct Sow (After Stratification): Sow seeds directly outdoors in spring after the last frost date..
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Indoor Start (Optional): After stratification, start seeds 6-8 weeks before the last frost date. Use biodegradable pots to avoid disturbing roots.
- Transplanting: Harden off seedlings gradually. Transplant outdoors after all danger of frost has passed.
- Maintenance: Water regularly until established. Once established, Tropical Milkweed is very drought tolerant. Cut back spent stems in late fall or early spring to encourage fresh growth.
- Soil: Prefers well-drained, moderately fertile soil (pH 6.0-7.5). Tolerates poor, sandy, or rocky soil.
- Add this classic red and yellow Tropical Milkweed to your garden today – and help save the Monarch butterfly while enjoying a beautiful display all summer long!
At our store, we're confident in our products. If seeds don't germinate, please contact us immediately. Each product comes with a worry-free 12-month warranty. If you have any questions or suggestions, please feel free to contact us and we'll provide friendly support within 24 hours.

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