Is there a more beautiful flower than the hydrangea’s? For some people, the tastes are different. But flowers like the hydrangea ‘Endless Summer’, which bloom all summer long, really inspire everyone. Hydrangeas all have the potential to convince viewers of their beauty, large round flower balls with many individual flowers please most people. A hydrangea whose flowers bloom throughout the summer can be almost inspiring, and this is what they do with the hydrangea ‘Endless Summer’:

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Endless Summer ‘The Original’ is a ‘child’ of the American hydrangea breeder Prof. Dr. Michael Dirr, who discovered the world’s first multi-flowering hydrangea in an experimental plantation. He named it ‘Endless Summer’ and immediately started marketing it, the presentation of the first Endless Summer (‘The Original’) was celebrated in 2004 as a botanical sensation.

It is, the name says it all, ‘Endless Summer’ blossoms tirelessly throughout the summer and, like a remonting rose, adds new flowers every 6 weeks. Always especially large ball-shaped flowers, in contrast to “normal hydrangeas” on the old and new wood.

The winter hardiness should also be exemplary, “All Endless Summer flowers guaranteed every year, no matter how hard the winter is, they are extremely frost hardy down to -30 °C” promises the website of a German plant trading company. This corresponds to USDA winter hardiness zone 4a/5b, in Germany it doesn’t get colder than 5b, nevertheless there are reports that Endless Summer didn’t flower as endless as promised.

Dr. Michael A. Dirr just spoke in an interview about plants that do not grow as promised: He had listened to people whose ‘Endless Summer’ in zones 5 and 6 did not develop multiple blooms, and it had always been a matter of care (old flowers not removed, not fertilized, not watered), but a season could also be too short for multiple blooms. The genetic predisposition to multiple flowering had been endlessly tested, in the meantime over 20 million ‘Endless Summer’ had been sold in more than 10 years. He and his team had the multiple flowering in zones 7 and 8 safely under control and also received good results in zone 4, 5, 6 of the ‘Endless Summer’ (Interview:

Now Dr Dirr wanted to become a gardener after a statement “since he jumped out of the womb” and has been gardening for about half a decade, he will certainly be able to handle his discovery better than a gardener who is just starting (and maybe in rough areas the season is too short for multiple flowers). But the ‘Endless Summer’ certainly didn’t have such a steep career without a reason, today it belongs with its meanwhile developed siblings ‘The Bride’, ‘Twist-n-Shout’ and ‘BloomStar’ to the most famous hydrangea family in the world.

The ‘Endless Summer’ is basically cared for in the same way as any other hydrangea, but with a little more care if you want to see continuous flowering:

The botanical name “Hydrangea” does not mean “water vessel” for no reason, hydrangeas love water
Shortly after planting, water at least once a week, also in dry and hot summer periods
Better a once in a while than more often and only a little bit
When you see many green leaves and few flowers, you have exaggerated.
Fertiliser is important for flowering, long-term fertiliser in spring
NPK fertilizers containing 7% nitrogen, 3% phosphate and 6% potassium are well suited (information on packaging, NPK 7-3-6 or similar).
Tip: Endless Summer grows very compactly and is therefore also suitable as a tub plant, it even brings its own pretty light blue tub with it: Endless buzzer


The Endless Summer needs only little pruning, but the endless flowering requires its care:

Overall, ‘Endless Summer’ develops best without pruning.
Especially young/freshly planted plants grow stronger if they are not pruned first.
Here only beauty care is due, optically disturbing and cross growing branches are removed.
If the Endless Summer has to be thinned out at some point, it can be done in late summer.
More light in the inner area should have a positive effect on bud formation
If an all-round pruning is due, e.g. because the plant becomes too overhanging, the pruning is carried out in spring.
After the last frost, until then the last flowers of the previous season may protect the plant.
The amount of pruning depends on the age of the hydrangea.
When the young Endless Buzzer is rooted in and has gained strength, it may be given a light contour cut.
Older plants can be pruned more vigorously, with little space up to a third of the old shoots can be removed.
This rejuvenates the plant and promotes its growth.
The flowers should be removed again and again by wilting.
The best way to regenerate the hydrangea is to break it out carefully so that it regenerates faster.
Fix stem with thumb and index finger, flower can easily be broken off to the side with the other hand.
If you are fast, the Endless Buzzer becomes a continuous bloomer.
Tip: Endless Summer is the ideal hydrangea for hobby florists, it constantly delivers new flowers for the vase or for drying, and the cut even promotes new flower formation.


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