I have had cuttings of 2 kinds of hydrangeas sitting in glasses of water for a few weeks and they're starting to send out roots and look healthy. If all goes well I think it will be several more weeks before they have enough roots to safely plant.
My question is this: After planting, can I continue to grow them indoors over the winter or do they need a period of cold dormancy? I can't imagine that they'd survive the winter outdoors in their newly rooted state, but I have no experience with shrub propagation.
Any advice much appreciated!