Endless Summer Hydrangea is a mop-head type of hydrangea that has blue flowers when grown in acid soil or pink flowers when grown in alkaline soil. It blooms on old wood in the spring and on new wood later in the growing season.Endless Summer Hydrangea has a rounded form and grows 3 to 5 feet tall and wide. It needs little pruning, other than removing dead flowers and trimming wayward growth. Endless Summer Hydrangea may also be labeled as Hydrangea macrophylla 'Bailmer'.
Use hand pruners to cut stems with faded flowers to half their length to encourage new growth and more flowers during the growing season. Cut stems at a bud at a 30-degree angle.
Remove diseased, damaged or dead limbs in the fall after the last flowering. Use hand pruners to cut them at a bud or joint, or at ground level at a 30-degree angle.
Use hand pruners to trim elongated or wayward limbs close to the main part of the shrub to maintain the shrub's rounded form. Cut them at a 30-degree angle near a bud or joint.
Remove dead flowers with hand pruners in the fall. You can also leave the flower heads on the plant to help insulate new buds and for winter interest. If you leave the flower heads during the winter, remove them in the spring before new growth begins.
Use hand pruners to remove any winter damaged limbs in the spring. Cut them at a 30-degree angle at a bud or joint.