The primary propagation methods for broom include seed sowing and taking semi-hardwood cuttings. Success hinges on several key factors: full sun exposure, well-draining soil, and moderate temperatures. Special care should be taken to treat the seeds with hot water before sowing to break dormancy. Propagation presents a moderate difficulty, as seeds may have inconsistent germination rates. Cuttings should be done in late summer to early fall for best results. Step-by-step: 1) Scarify seeds with hot water, 2) Sow in well-draining soil, 3) Provide consistent moisture and good light, 4) For cuttings, select healthy stems, apply rooting hormone, and plant in a sand-peat mix, 5) Maintain a humid environment until roots establish.