How to Start Perennial Seeds
- 1). Treat the seed as indicated on the seed packet. Place seeds requiring cold treatment in a plastic bag and store them in the refrigerator for the amount of time recommended, usually four or more weeks according to the University of Illinois Extension. Soak hard-coated seeds in warm water overnight, or scuff the outer seed coat with a piece of coarse sandpaper.
- 2). Fill seedling pots with a well-drained, fine-textured potting soil. Use pots that have at least one drainage hole on the bottom so the soil does not become soggy. Place the pots in a tray.
- 3). Water the soil until the excess moisture begins draining from the bottom. Allow the pots to soak in the excess water in the tray for four hours, ensuring the soil becomes evenly moist, then empty the water from the tray.
- 4). Sow two perennial seeds per pot, planting them at a depth of twice their width. Cover the pots with a plastic bag, which retains moisture in the soil during germination.
- 5). Place the pots in a room with a temperature recommended for the seed. Generally, most perennial seeds germinate at temperatures between 65 and 75 F.
- 6). Remove the plastic bags once sprouts appear. Move the pots to a warm, sunny windowsill and water when the soil surface begins to feel dry.
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