How to Propagate rehmannia?
Rehmannia can be propagated by seed sowing, division, or cuttings. For seeds, stratification might be needed to improve germination rates. Division is easiest, done in spring. Cuttings require high humidity. Key factors for propagation include warm temperatures (around 20°C), indirect light, and well-draining soil with plenty of organic matter. Overwatering should be avoided to prevent rot. Difficulty level is moderate; care with watering and temperature is critical. Steps: 1) Choose the method, 2) Prepare environment (soil mix, pots), 3) Perform propagation act (sow, divide, cut), 4) Maintain appropriate moisture and temperature, 5) Transplant once established.