Mulch around the base of the spicebush to prevent weeds and conserve soil moisture. Add about 3 to 4 inches of mulch, spreading it out to the drip line of the shrub. The mulch will also insulate roots from winter temperatures.
Provide water for the spicebush if less than 1 inch of rain falls during a one-week period. Water the soil around the shrub to saturate it completely.
Fertilize the spicebush once in the spring after the growing season begins. Mix the fertilizer with water according to package recommendations. Pour the mixed fertilizer over the soil around the spicebush to saturate the soil.
Prune a spicebush in the spring after it finishes blooming. Cut back the individual stems to shape the shrub into an attractive rounded shape. Do not remove more than one-third of the length of each stem and cut the stems off at a leaf node for best results.