Hi, I would like to know If my propagation cuttings continue to grow over the winter or will they go into dormancy. I live in New York city zone 7.  I started 10 cuttings from 2 different types of trees about 8 weeks ago using the wet paper towel/Plastic bag green house technique. Astonishingly, nine of them have sprouted roots up and down the cutting;some already have small leaves. I transfered them to Plastic cups with drainage holes and used a mix of abut 20% vermiculite and 80% Pearlite. I used another cup to form the roof of the green house.

If you ask me, I say you started too early.  However they should continue to grow throughout the winter.  The problem is decreasing sun light.  But there are members on this forum that have already started their cuttings so not to worry.  What varieties have you started?

Ed is correct it might be too early, but now you have to keep them going. Provide enough heat for them. Keep them indoors and close to a window with light.

There are several other problems - including potential outbreaks of fun pests like fungus gnats and spider mites.

It's much easier to start cuttings later, but there's no harm in starting them now.  Just don't overwater them or you'll end up losing them to rot.  I let mine teeter on the brink of letting them dry out completely during the winter.  If I see any condensation in the inside of the cup, I stop watering.

Oh, and to answer your question:  Yes, they will continue to grow (at some reasonable rate or the other) through the winter if you provide them with sunlight and temps above 50º-55º.  Note that roots don't like sunlight, so put clear cups inside an opaque cup or wrap the cup with dark paper or foil to keep sun out.

Try to keep temps in the mid 70s or a little more, to stimulate growth. I have some started now, in my itty-bitty greenhouse, and they should be fine. As long as they have warmth and light (not direct sun at this point) they should continue to grow. And by Spring you will be experienced and ready to start more cuttings.

Thank you all!!