How to care for cuttings in winter

Hi everyone! I live in Toronto Ontario Canada and have propagated elder berry, arctic kiwi, pear, apple cherry and currants from cuttings, they have only been rooting for 2 months now and have not quite filled their pots. I am wondering if I should keep them inside this winter to allow them to continue to form roots or plant them in the ground in their pots to let them go through their natural dormancy. there intended permanent home is a few hours from where I live so I want to be able to remove them easily in the spring without damaging their roots. If the answer is to leave them outside I assume I should cover them generously with mulch....? If anyone has any advice to offer it would be much appreciated!

P.s I kinda doubt the picture makes any difference but just thought I'd toss it in there..

Have a good day and much love from,

Farmer Joe

I keep them in an unheated garage for the first winter - or anything similar, ie. not freezing but not warm, not completely dark but not particularly light. Goldilocks overwintering method

Agree with CRT, or just keep them growing. Repot if necessary, but they'll just have an extra long first session.

i just have put them in the garden in the pots for the winter. i bury them slightly deeper than the top of the pot. i don't even mulch them and I'm in zone 3b. never lost any yet. you think about it. in the wild they don't have any special protection. plus they stay hydrated outside. makes a tougher plant this way. tried mulching 1 year and the voles ate every cutting!