Calocedrus decurrens, commonly known as California Incense Cedar, is an evergreen conifer native to western North America with aromatic wood and scale-like foliage. Seeds germinate moderately well under controlled conditions with cold stratification, though field germination typically ranges from 20-40%. This species requires patience as seedlings grow slowly but develop deep root systems.
Before sowing
Cold stratification for 8 weeks at 32-40°F (0-4°C) improves germination. No scarification required. Sow seeds in early spring in greenhouse after stratification.
Sowing
What to expect
Tips
Sow stratified seeds 1/8 inch deep in spring in greenhouse. Tamp soil lightly and mulch seed bed. Seeds may be sown at 10% chitting rate for best results. Grow seedlings in light shade in greenhouse or cold frame for first winter. Transplant to well-drained, fertile soil in full sun to partial shade after last frost. Mulch with pine needles, bark, or sawdust. Water regularly during establishment phase. Do not over-water as seeds are sensitive to waterlogging.
Sources: USDA Forest Service, Lady Bird Johnson Wildflower Center, USDA Plants, Forest Research UK, PFAF, Calscape.org
