Buxus sempervirens, or the box plant, grows as a bright green bush plant commonly used in topiary and other decorative landscaping designs. Buxus can grow nearly anywhere, in most types of soil, and both in sunlight and light shade. To produce healthy buxus plants that can withstand the heavy pruning of topiary work and keep up its green color, you must provide adequate food plant food, also called fertilizer. Water-soluble liquid fertilizer, applied regularly, is extremely effective food for buxus.
Mix liquid plant fertilizer and water according to the specific product instructions. Use a balanced, all-purpose fertilizer; buxus does not require extra types of nutrients.
Spray the soil surrounding the buxus plants with the recommended amount of fertilizer every two weeks during the growing season, which is generally from early summer to early fall.
Apply the final dose of fertilizer before the first frost of the season. Do not fertilize the plant during the winter, since new growth will not be able to withstand cold weather. Begin the feeding regimen again after the final frost of the year in the spring.