Hydrangeas forum: Hydrangea

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Laxmom
Nov 3, 2016 3:37 PM CST
We live in Ontario and my hydrangea are huge white balls. The gardener has done fall cut backs and has taken them down .. Are they going to grow okay next season?
Name: Sue
Ontario, Canada (Zone 4a)
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sooby
Nov 3, 2016 3:55 PM CST
Welcome! They sound like 'Annabelle' type hydrangeas. Unlike some other hydrangeas, these flower on new growth so they should still flower next year. They can be cut back quite hard and still flower (I prefer to prune them in the spring before they leaf out but they should be fine).
Hurst, TX (Zone 8a)
Dog Lover Region: Texas
luis_pr
Nov 16, 2016 1:28 AM CST
It might be a paniculata as well, like Pee Gee, etc. Both, paniculatas and arborescens (Annabelle, etc) will do fine if pruned now because they develop flower buds in late Spring to early Summer.

However, if I believe the USDA Zone map I saw for Ontario and its rating of Zone 6 in some areas, you might have a white mophead too since some have large white blooms. Mopheads typically develop flower buds only in July-August (late August around the US_Canada border); so those you do not want to prune them now because you would be cutting off 2017's blooms. But some of those mopheads are rebloomers and will develop blooms again in early Summer; so if you prune those rebloomers now, you can still get bloomage.

Below is a link where you can look up your blooms and determine for sure which kind of hydrangea you have:

http://hydrangeashydrangeas.co...

Bottom line: the plants should grow fine Hurray! but there could be bloom issues depending on what type of hydrangea you have. I always add some mulch up to the drip line in the Fall if they have too little (maintain 2-4" or 5-10cm). Should they be planted in containers, bring them inside for the duration of winter once the plant goes dormant and the leaves brown out and dry out.
[Last edited by luis_pr - Nov 16, 2016 1:30 AM (+)]
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