African lilies, also known as Agapanthus, can be propagated by division or by seed

Division

Dig up the clump: In early spring, dig up the mature plant. 

    Wash the roots: Remove the soil from the roots. 

    Cut the clump: Use a sharp knife to divide the clump into smaller sections. Each section should include some roots, foliage, and new buds. 

    Replant: Replant the divisions at the same depth as the original plant. 

    Monitor: If the plant is in a pot, monitor it closely. 

    Seed 

    Extract the seeds: Remove the seeds from the pods.

    Sow the seeds: Sow the seeds immediately.

      When to propagate 

      Garden plants: Divide every 4–6 years.

      Potted plants: Divide and repot every 4–5 years.

      Deciduous plants: Divide in early spring.

      Evergreen plants: Divide in autumn after blooming.

      Why propagate

      Division is a good way to expand your garden or share plants with friends. 

      Potted plants bloom better when root-bound.