Growing Rudbeckia from Seed in Chicago (Zone 5)

Indoor Start (6–8 weeks before last frost)

1. Sow ¼" deep in moist seed mix; seal pot in plastic bag.
2. Germinate at 70°F (2–4 weeks).
3. Provide strong light (shop light 8" above).
4. Transplant to individual pots at true-leaf stage.

Harden Off & Plant Out

After last frost, acclimate 7 days in protected outdoor spot. Plant in full sun. Rudbeckia often doesn’t bloom first year from seed. Divide established clumps every 2–3 years to maintain vigor.