African daisies, also known as Osteospermum, can be propagated by taking cuttings or dividing the plant.
Propagating by cuttings
Take cuttings In late fall or early spring, use sharp, sterilized pruners to cut 3–5 in stems with at least two leaf nodes. Choose non-flowering stems or remove flower buds.
Prepare the cuttings: Remove the leaves from the bottom half of the cutting. Dip the cut end in rooting hormone.
Plant the cuttings: Fill a tray with a seed-starting mix and dampen it. Insert the cuttings into the mix, leaving the top leaves exposed.
Cover and place: Cover the tray with a plastic dome and put it in a bright location with indirect light and a temperature of 60–68°F.
Wait for roots: After 4–6 weeks, the cuttings should have roots and be ready to transplant.
Prepare for transplanting: Harden the cuttings by moving them outdoors for short periods of time.
Plant outdoors: After the last spring frost, transplant the cuttings to individual pots or directly into the garden.
Propagating by division
In early spring or fall, dig up the clump of African daisy.
Using a sharp spade or knife, divide the clump into smaller sections with healthy roots and some foliage. Plant the sections in well-drained soil in a sunny location with some shelter