To propagate Fringe Cups (Tellima grandiflora), the most common methods are by seed or by dividing established plants, with seed propagation being the easiest option as they readily self-sow, while division is best done in early spring after the flowering period is finished; both methods prefer a partially shaded location with moist soil conditions. 

Propagation by Seed:

Collect seeds: Allow the flowers to go to seed and collect them when they are mature and dry. 

Sow seeds: Sow seeds directly in the garden in a prepared, well-drained soil in a partially shaded area, or start them indoors in pots with a seed-starting mix. 

Germination: Keep the soil moist and expect germination within a few weeks. 

Thinning: Once seedlings emerge, thin them to the desired spacing. 

Propagation by Division:

Timing: Divide established Fringe Cup plants in early spring, just after flowering is complete. 

Dig up plant: Carefully dig up the entire plant from the ground. 

Separate divisions: Use a sharp knife to separate the plant into smaller sections, ensuring each division has healthy roots and shoots. 

Repot divisions: Plant the divided sections in new locations with well-drained soil in partial shade. 

Key points to remember about propagating Fringe Cups:

Best growing conditions: Fringe Cups thrive in partial shade with moist, well-drained soil. 

Soil requirements: Use a humus-rich soil for optimal growth. 

Watering needs: Keep the soil consistently moist, especially during hot weather. 

Potential for self-seeding: Fringe Cups readily self-seed, so remove spent flower heads if you want to control their spread.