I'm rooting different cuttings: Weigela,Burning Bush,Forsythia and Hydrangea.My question is once they're rooted I'm planning on putting them in 4 inch pots until they get better roots. But what should I do in the winter with them? I don't have a cold frame or a greenhouse. I thought maybe I could bury the pots in the ground and maybe add some leaves on top of them. Should I transplant them in bigger pots to bury them.I'm in zone 5 Can zone 4 Usda.
As anyone had experience doing this.
Any help would be greatly appreciated.