Planting Purple Coneflower Seeds in Fall vs. Spring in Green Bay, Wisconsin (Zone 5)

Fall Planting Outdoors: No

Seeds need heat to germinate. Fall soils are too cold. They’ll rot or sit until spring — high loss.

Best Approach: Indoor Start in February

1. Mix ½ potting soil, ½ vermiculite in seed tray.
2. 1–2 seeds per cell; cover lightly.
3. South/east window or grow lights 6 hrs/day.
4. 65–70°F; bottom water.
5. Transplant to 2–3" pots when rooted.
6. Harden off; plant out after last frost (late May).

Alternative: Buy Plants Now

Nurseries have stock through October. Plant immediately, water well, mulch.

Division Option

Ask a gardening friend for a division — fall is great for transplanting established coneflowers.

Soil Prep (Do Now)

Amend beds with peat, sand, gypsum, Milorganite, mulch, compost. Rototill 8–10 inches. Ready for spring planting.