09/11/2025
Guide to collecting and planting Milkweed seeds for Monarchs
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Collecting Seeds:π±π±π±
In late summer to early fall, look for milkweed pods that have turned brown and begun to split open. The seeds inside should be brown (not white or green). Gently collect them before the wind carries them away. Remove the silky fluff by placing seeds in a paper bag with a few coins and shaking, or by hand-separating. Store seeds in a cool, dry place until youβre ready.
Cold Stratification (Helping Them Germinate):
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Milkweed seeds need a period of cold to wake them up. Place your seeds in a damp paper towel inside a sealed bag, then refrigerate for 30β60 days. This mimics winter and boosts germination.
When & How to Plant:
β’ πΏ Outdoors: Sow seeds directly in fall after the first frost. Nature will handle the cold stratification over winter.
β’ πΏ Indoors: Start seeds in spring, about 8β12 weeks before your last frost date, after stratification. Plant 1/4β deep in moist soil with good light. Transplant seedlings outdoors after danger of frost.
Extra Tip: Plant milkweed in clusters to give monarchs a strong nectar source and plenty of leaves for their caterpillars. Native species work best in Missouri and are the most resilient.
πΈ By planting milkweed, youβre creating a sanctuary for monarch butterflies and other pollinators. Every patch makes a difference! π¦π