Propagating lovage can be successfully achieved through seed sowing, root cuttings, and division. Key factors include ensuring high light exposure, maintaining a temperature range between 15°C to 20°C, and planting in rich, well-drained soil. Special attention should be given to seed viability, which decreases with storage time. The general difficulty level is moderate. Division of mature plants is the easiest method but requires careful handling. Suggested steps for seed propagation: 1. Sow seeds in early spring in a tray of moist soil. 2. Cover lightly with soil, maintaining a depth twice the seed diameter. 3. Place in a bright, warm location. 4. Keep soil consistently moist but not waterlogged. 5. Transplant seedlings to individual pots when they reach a manageable size. 6. Eventually, plant out in the garden after frost danger has passed.