Primary propagation of calico typically involves seed sowing, as cuttings can be less reliable. Key factors for successful germination include well-draining soil, consistent moisture, and full sun to partial shade exposure. The ideal temperature range is 60-70°F. Special considerations include scarification, as seeds have a tough outer shell, and stratification if mimicking natural conditions is necessary. Propagation difficulty is moderate due to seed dormancy factors. For propagation, follow these steps: 1) Scarify seeds gently. 2) Sow seeds in a well-draining medium. 3) Maintain even moisture, but avoid waterlogging. 4) Provide adequate light. 5) Expect germination in 2-4 weeks, and then manage seedlings with care to avoid transplant shock.