The Q&A Archives: Endless Summer Hydrangea

Question: when, if ever, am I supposed to prune? What do I add to the soil to continue blue color?

Answer: The bloom color is related to soil pH, with the best blue when the soil is acidic, so to maintain the best blue you should use a fertilizer for acid loving plants. Endless Summer blooms on both old and new wood, so pruning time is not as important as with some types of hydrangeas. I would suggest you reach inside the plant and remove some of the longest stems from time to time. This way you should always have blooming stems on the plant. If you prune it back hard all over all at once, you will cause a gap in the blooming cycle. You could however trim it back quite short all over in the early spring. This would delay blooming, however it would allow you to control the size as much as desired. The blooms do change color as they age and eventually turn papery or tan. This is normal. You can deadhead or remove the flowers as they fade if you do not like the look. Enjoy your hydrangea!

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