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The Rose of Sharon is also a hibiscus (Hibiscus syriacus) hardy in zones 4 or 5 through 8 or 9. This is a shrub that blooms in late summer. Prune these in late winter or early spring before growth begins. Remove any dead branches. Cut dead tips back to a healthy side branch or above a bud. Limit additional pruning to what is needed to shape or control the plant’s size.

Oct 25, 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. Throughout the summer, the plants shape can be maintained by cutting back overgrown spirea shoots or stems as well as any dead or diseased branches.

Jan 04, Cutting back perennials before they have flowered, often known as the Chelsea Chop, will promote healthy growth, optimise their flowering potential and keep your borders looking their best.

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You can also cut back early-flowering perennials such as hardy geraniums, foxgloves and primulas, right after they have stumpclearing.bar: BBC Gardeners' World Magazine. Mar 02, 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. More drastically cutting back spirea should occur in the fall or in late winter to early spring. Aug 05, For these shrubs, some experts recommend a very severe form of pruning, known as rejuvenation pruning.

This involves cutting the entire shrub off at a level just six to 12 inches above the ground. The shrub will be little more than an unattractive clump of stems for a short while, but it quickly restores itself to a new, improved shape. Jan 13, Most hardy geraniums need to be trimmed to keep them from overtaking other plants and to encourage new growth.

Once the plant has finished blooming or you notice old growth, trim it back to within a few inches of ground level, or about an inch above the main stem. Then, go in and remove any brown stems or yellow leaves. May 05, Pruning to Rejuvenate If you are pruning an azalea in order to tree falls on car 176 the plant because it’s become spindly or sparse, locate three to five of the largest branches on the azalea bush.

Cut these branches back by a third to a half. Trim all the other branches on the plant as though you’re shaping the plant.