Primary propagation for retama is through seed sowing or cuttings. Key factors for success include full sun exposure, well-draining soil, and mild to warm temperatures. Special techniques such as scarifying seeds or using rooting hormones for cuttings may enhance propagation. Generally, it's moderately difficult due to seed dormancy and the delicate nature of cuttings. Steps involve (1) scarifying seeds and sowing in warm soil, or (2) taking semi-hardwood cuttings, applying root hormone, and planting in well-drained medium. Carefully monitor water and temperature throughout.