Out of the varieties you have I'll research which are the most cold hardy. Are they mature trees the scions would be coming from? I have 4 seedling trees that are healthy enough to attempt grafting. I probably should wait for spring though. Afraid if they dont take enough the cokd may take them outdoors way up here or won't be strong enough to survive being brought in over and over all winter. Its pretty cold up here.
The only one that I still have available to trade right now is Poncho, after a few trades I've agreed to in the last couple days. Here's what the Poncho looks like after I just planted it out (was in a 15 gal pot):
So it's a small grafted tree, but if it survives the winter I expect it to flower next spring. I have already grafted scions of Poncho onto a couple Bacon seedlings to keep as backups in case the main tree doesn't make it.
The rest are mostly on similar sized multi-graft trees in my greenhouse that I grafted in February/March, and they are on their second or third vegetative flush since then. E.g., here are branches of Royal-Wright (left) and Duke (right) on one tree (it also has a couple Aravaipa branches out of the frame above):
By next spring I expect them to be fairly good sized branches with the ability to cut some more scions.
A few of the named varieties that I have (Joey, Jade) are grafted on smaller seedlings and probably won't have scions to spare for another year (i.e., maybe next summer).
Also, I'm not sure where in north FL you are, but if you can get to Gainesville for a Thursday farmers market, Oliver Moore is usually there selling seedlings and grafted trees that have survived in his yard there and produce well. I got a couple of mine from him when I was there on a trip a couple months ago. Here's a recent photo of the Jade plant I got from him: