Native to South Africa, the gerbera daisy (Gerbera jamesonii) produces big, elegant blooms that peak in the cooler temperatures of early summer and late autumn. Gerbera daisies, which range in height from 12 to 18 inches, are perennial in U.S. Department of Agriculture plant hardiness zones 9 through 11. In cooler climates, the plants are grown as annuals. Gerbera daisies usually don't require repotting because the plants have a short lifespan of no more than two to three years. However, if your gerbera daisy is outgrowing its container, repot the plant in spring.
Prepare a container one size larger than the plant's current container. Larger containers contain too much potting soil, and the dampness may cause the plant to rot. Place a piece of mesh, paper coffee filter or a shard of broken pottery over the drainage hole to prevent potting soil from washing through the hole.
Place 2 to 3 inches of dry potting mixture in the bottom of the pot. Use a commercial potting mixture containing peat moss.
Turn the old container on its side and guide the daisy carefully from the pot with one hand while you support the plant with your other hand. Loosen the roots with your fingers if they are compacted.
Place the daisy in the center of the new pot at the same soil level as it was in the old container. Remove the plant and add or subtract potting mixture to the bottom of the pot to bring the plant to the correct level. The surface of the soil should be 1/2 to 1 inch below the rim of the container.
Fill in around the rootball with potting mixture, and then press the soil lightly with your fingers. Water the plant until water runs through the drainage hole, then let the pot drain.