I have two hydrangea cuttings that have taken root (of the 8 I tried!) and seem to be doing ok in their pots much to my surprise, however it's moving into winter soon and we've had a couple nights below freezing. (Pennsylvania) I've been bringing them into the garage at night and putting them out during the day, but am not sure the best thing to do with them through the winter.

Guides and articles I've looked at online for overwintering hydrangeas in the garage seem to all be targeted to larger plants that are more established, and basically say to bring them into the garage, leave them alone, and water once every few weeks or once a month.

Will these little things go into hibernation mode like my large hydrangea outside? Should I be bringing them in and out to get sun or should they just be moved into the garage (unheated, but stays above freezing). I don't want to accidentally kill them!

Any guidance/suggestions greatly appreciated!

Bring them inside permanently and put them in as bright or as Sunny a spot as possible. Their growth will slow down which is normal.
Don't fertilize during the winter. You can probably put them out in late March, give or take.
Keep them away from a heat source.

BigBill said:Bring them inside permanently and put them in as bright or as Sunny a spot as possible. Their growth will slow down which is normal.
Don't fertilize during the winter. You can probably put them out in late March, give or take.
Keep them away from a heat source.

Ah, slight dilemma to that I should have included. They can't come in the house to live in a sunny window b/c of cats, and the garage doesn't have a window, so they won't be able to get any sun. Husband suggested maybe a plant light over them in the garage would be ok?

I'm in PA too-zone 6, and this is what I have done with cuttings and plants that I thought were still too small to plant outside. I sink those pots in the ground near the foundation of my house. I put a large glass jar over the pot-actually the jar rim fits right inside my 6" plastic pots. ( These jars are about 10" tall and 5 1/2" wide. I was able to buy a few very cheap at a local restaurant where they buy pickles in bulk.) I trim back by 1/2 any of the leaves that would be touching the side of the jar. The jar acts like a small greenhouse, keeping in the moisture, and allowing the plant to continue growing as long as possible. I'm trying to remember if I ever used a clear plastic container over plants--I may have, and I think that worked too, but plastic gets brittle sometimes, which is why I like using the glass jars. This method has worked for me many times. When the weather warms up in the spring I take the jar off. Usually I'll see new growth starting, and then I can plant it wherever I want it.

Following this question. Mine are in the garage (zone 6b) also since my little cuttings like yours didn't survive outside last year (maybe should have put pots/jars over them as suggested). I rooted them in this container with the lid on that retains moisture for them, so decided to leave them there for the winter & will bring them in if it's really cold (my cats can't get at them in the box when it's covered). Some have started to turn yellow, so I'm getting a little worried that I should have a lamp on them, or if it's normal?

First make sure there is no chance of nutrient issues, soil pH problems (too alkaline) or overwatering (soggy soil could also simulate iron chlorosis symptoms). If you can rule those out, I would then assume that they are yellowing because they are going dormant.

At my house.... I can take cuttings in the Autumn and set them out in a cutting bed... and leave them through the winter. They leaf out in the Spring. Easy-peasy.
Based on my experience... I would leave them alone... in y'alls garage, they should experience winter dormancy, and when you set them out in the Spring... be happy as clams.