The best time to rejuvenate large, overgrown shrubs is late winter or early spring.

Mar 30, 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 stumplopping.barted Reading Time: 5 mins.

Pruning immediately after flowering allows gardeners to enjoy the spring flower display and provides adequate time for the shrubs to initiate new flower buds for next season. Summer-flowering shrubs, such as potentilla and Japanese spirea, bloom in summer on the current year's growth.

Prune summer-flowering shrubs in late winter or early spring. Nov 23, To control the spirea's size and keep it blooming year after year, you should prune it back after blooming or when it's dormant in winter. If it's severely overgrown, cut it to the ground to. 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. More drastically cutting back spirea should occur in the fall or in late winter to early spring.7 days ago.

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Read the full answer. Nov 02, Cutting back your spirea in late winter or early spring will allow your plant to be shaped into a hardy and fuller-looking plant. Trimming the plant early in the year will give new growth the room and light to thrive after being dormant.

But it is equally important to prune your spirea at the end of its blooming season as stumplopping.bar: Jeffrey Douglas.