hydranga pruning - Knowledgebase Question

Long BeAch, Ca
Question by divadagget
August 14, 2009
My large gorgeous hydranga bush usually yields 75 or more blossoms each year. But this year there was only ONE blossom, though the greenery and leaves were all healthy. What happened? Could method and/or timing of pruning be the problem? How do I get my blossoms back next year? Thank you so much.


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Answer from NGA
August 14, 2009

0

What a disappointment! Hydrangeas flower on new growth that develops on old wood. Pruning is usually done in the early spring. Old wood is pruned down, usually to about 24" above ground - but you can keep yours longer if you wish. The new growth that develops on the old woold should develop one flower per stem. Try pruning yours next spring to see if you can't coax some more blooms from it. Other things that can keep the shrub from blooming are inadequate sunlight and over fertilization. Too much nitrogen will encourage lush, green growth but at the expense of flowers. Hope this information sheds some light on the subject!

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