Gardeners should wait to transplant hardy hibiscus when soil temperatures allow it to be workable and when new growth is evident after the plant's dormant period. Survival rates for hibiscus plants when transplanted at this time are higher than at other periods.
Preparation of the new site includes removal of the soil from an 18-inch diameter hole, approximately 2 feet into the ground. Mixing the soil with equal portions of compost and peat moss provides an ideal growing medium.
The first step in preparing the plant for transplanting is to trim the old growth to within a few inches of the ground. The root ball of the plant should be removed by cutting a circle approximately 12 inches in diameter around the plant with a spade. Placing the spade into the cut circle and pressing down frees the root ball for transplanting.
Filling the hole with a sufficient amount of soil mix ensures the plant remains at the same level with the ground as it was before planting. GardenGuides.com recommends filling the rest of the hole with soil and pressing the soil in place with the feet. Forming a small ridge with the remaining soil mix funnels rainwater to the roots to establish the plant. The hibiscus needs mulch and the equivalent of an inch of rainwater weekly.