Cut all the stems of the"Goldmound" spirea down to within 3 inches of the ground to ensure fresh, lush growth and many blooms. This can be done annually or every few years as the plant.
Mar 30, Wondering when to prune spirea bushes? The best time to prune spirea is after the first flowering. For a spring-blooming cultivar, a good time will be in late spring. For a summer-blooming variety, this will be in mid-summer.
During the spirea trim, cut the back the tips of the stems to the top of the leaf shrubdisposal.buzzted Reading Time: 5 mins. Mar 02, How to Prune Spirea. You should actually prune your spirea more than once a year, at least twice. Give it a good trim after it flowers in the spring by cutting back the tips of the stems to the top leaf bud. This removes the dead blossoms and also may trigger a second blooming and new leaf growth.
You can also shape the shrub at this time. Pruning during the first two seasons will help make the shrub thick instead of leggy.
Deadhead after blooming to promote more flowering. If you do not deadhead, they fade quickly and do not detract from the beauty of the plant. Goldmound Spirea has a natural disease resistance. It also tolerates heat well. Deer do not like to eat them.
For yellow leaved cultivars (Goldflame, Goldmound etc) second pruning/shearing is even more desirable since new yellow/copper/red growth is the main attraction of the plant, not a flowers. During the second pruning you may cut shrub in a half with no ill effect. Cutting deeper will not give plant enough time to gain former size by the fall.