Grapes are usually started from dormant cuttings. Here they are not yet dormant but when they are I would start them outside. In your zone that is probably not possible. Al

If they are cane hardy in your zone, they should be fine started outside...might want to cover them with a soda bottle and pile mulch up around them to keep the soil temp stable...they should callus over winter and root when the soil temp warms in spring.

The other option is to bundle them and bury them upside down...dig when soil thaws in spring and stick.

I guess I should have mentioned...yes, they are hardy in our area. Not many types of grapes are, but these ones overwinter fine and produce nice sweet grapes, great for eating or for wine and jellies.

So is it a good idea to take cuttings right after you harvest a year's crop and put them into the ground while the temperature is still between about 35 and 70 degrees F.?

Do you need to put the cuttings in water first till they start to sprout roots?