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Do hydrangeas need a dormant period?

4 months ago

I have some cuttings I took in May that have grown to gallon-sized plants. Planning to put them in the garage for the winter after they go dormant and plant in spring.
Also have some cuttings of some other macrophyllas that someone gave me in June, and they've rooted but are still very small and have only put out a few new leaves. I'm wondering if I can set them in the window for the winter. Or even just keep them growing indoors for an extra month or two and then let them go dormant until spring. It's not clear to me whether hydrangeas need a dormant period. Anyone know?

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