Growing Canna Lilies from Seed: Scarification, Sowing, and Overwintering

Starting Canna Seeds in February

Canna seeds have hard coats; scarification speeds germination.

Steps

1. Rub seed coat with sandpaper until lighter color shows.
2. Soak 2 days in warm water.
3. Sow ½ inch deep in potting soil; keep at 75–80°F (24–27°C).
4. Germination in 2 weeks; seedlings resemble thick grass.
5. Transplant to individual pots when handleable.
6. Grow under 40-watt shop lights until after last frost.
7. Harden off 1 week in shade; plant in full sun.

Overwintering Rhizomes

In frost-prone zones, lift rhizomes in fall, store cool and dry, replant in spring.