Question
Hello Gary,
My name is Ljubica, I come from Belgrade, Serbia. This is USD zone 7b, I guess. The lowest winter temp.drops between -10 to -15 Celsius degrees (sorry, don't know F measures.) To make a story short, my question is where and how to overwinter hardwood and SH cuttings taken about 4 weeks ago, no signs of rooting taking place yet. I still keep them outdoors (in plastic boxes filled with coarse, builder sand-I have satisfactory experience rooting cuttings this way)since the temperature is over zero C and there's no danger of freezing.
I'm molecular biologist by background education and a self-taught gardener. But this is for the first time I took cuttings late in the fall and don't know how to keep them overwinter in order to continue rooting process. Unfortunately I have no greenhouse, but live in a pretty large house (with atic) where I can find some suitable conditions for further propagation. The cuttings are taken from Spirea GoldFlame, variegated Weigela, various kinds of juniperus species, Lonicera, Tamarix, Santolina, cineraria, almost hundred of them, and they all look alive, fresh and wonderful.
With regards,
Ljubica

Answer
Ljubica,

I would be tempeted to leave them outside in your rooting container and cover with plastic sheeting.  It will be crucial to prevent the cuttings from dessicating.  Place the container close to the house foundation in a spot protected from the wind.  Check periodically the moisture and water if needed.  Many nurseries propagate cuttings outside over the winter in USDA zone 7 and higher.  

Good luck

Gary