Oct 25, Also, trimming spirea back, in many cases, will induce a second bloom.
Other varieties of spirea, such as Japanese spirea, respond better to pruning in the late winter months. How to Prune Spirea Bushes. Spirea shrubs respond well to pruning. In the spring, after the first blooms are spent, cut the dead flowers back by trimming spirea’s stem tips back to the topmost leaf on each stem.
Trim back overgrown spireas or those that produced sparse foliage on the lower stems severely in fall after the foliage begins to fall off, to keep the shrubs shaped and compact.
Cut back each stem to within 8 to 12 inches of the ground. In the same manner people ask what month should you trim bushes? The best time to rejuvenate large.
Jun 23, Spireas that bloom in spring: in this group are for example the Thunberg spirea and Vanhoutte spirea. The right time to prune the species that bloom in spring is after flowering, ie late spring.
Those spireas that bloom during the summer: in this second case there is the false spirea, and it must be pruned before the growth of spring bushpruning.buzzted Reading Time: 9 mins.
Nov 23, Spirea requires rejuvenation pruning about once every three or four years. You should cut dead and old stems back to the ground each year. Writer Bio. Ruth de. 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. Some summer pruning can also be done on particularly vigorous plants, but not after mid-July.
As the plant matures, some “renewal pruning” should be done. This is done in early spring by removing two or three of the plants largest canes to the ground. Repeat this process each year over a three year period to re-invigorate old plants.