Primary propagation methods for hyssop include seed sowing, stem cuttings, and division. Key factors for successful growth involve full sunlight exposure, well-draining soil, and moderate temperatures. Care should be taken to avoid overwatering. Hyssop is relatively easy to propagate, but seeds may require stratification to improve germination rates. To propagate via cuttings, follow these steps: 1) Cut a 6-inch stem section below a leaf node. 2) Remove lower leaves and dip the cut end in rooting hormone. 3) Plant in a pot with seed starting mix. 4) Water lightly and cover with plastic to retain moisture. 5) Place in bright, indirect light and remove the plastic once roots develop.