Although the name ‘Endless Summer’ (Hydrangea macrophylla ‘Endless Summer’) could suggest the title of a cable tv show or a soap opera, it is actually the name of a wonderful mophead hydrangea. What makes this hydrangea with its brilliant blue flowers so special is that it reblooms. It blooms on old and new wood in the same season, often blooming in early summer and then in fall. Another positive about ‘Endless Summer’ is that if a late frost kills the early blooms there will be more to follow. This easy- to-grow hydrangea likes the same things that other mopheads do: ample water (at least an inch per week), morning sun, and afternoon shade. Give it a good home in rich organic soil. If your soil is heavy, consider making a planting bed instead of just a single hole. Planting a hydrangea high as you would an azalea also will improve drainage. Just because a plant likes shade, planting it right next to a large tree is not often a good idea as the plant has to compete with the trees roots for nutrition and moisture. High shade in a yard is a blessing. A nice layer of mulch is always a good idea as it will help to conserve moisture and keep the soil cooler in the summer.
Pruning techniques for ‘Endless Summer’ are not difficult. Prune mopheads immediately after flowering. Because ‘Endless Summer’ reblooms, pruning it should occur in late summer to early fall. However, flower buds for the next season may begin to form from August to October so if yours needs pruning, you may have to sacrifice a few late flowers to get this garden task accomplished at the right time. It is a good idea to prune out all the dead canes and even to cut about one third of the older stems to the ground every year. This will encourage your hydrangeas to grow stronger, have a nicer shape, and have more flowers.
My mature ‘Endless Summer’ is about 5 feet high and almost that wide. It is a joy in the garden as the flowers look like jewels. With so many gorgeous hydrangeas on the market it is often difficult to choose a new one, but those that rebloom are a necessity for the summer garden, guaranteeing you a summer full of endless flowers.