if you dig deeply around them, at least 6 or 8 inches, they probably have a long taproot that wouldn't like to be damaged. i used to work seeds and seedlings for a production nursery so i have a lot of confidence doing so.. if they're not where you want a tree, there's nothing to lose by trying :)

we used to use the same mix we used for everything.

if you don't have any, i'd recommend ordering some mycorrhizae.. some of the stuf you'll find in local nurseries have myco amended fertilizers, but you can find pure myco online or at hydro shops. i use earth juice's rooter's myco.. think it was about $10 for 16 oz., enough to last ages.

You can totally transplant them, just dig super deep like xoxos suggested. I definitely wouldn't do it until mid-autumn though, as it's just too hot right now. If you plant them in the ground I'd use native soil mixed with about 25 percent compost, but again, I'd wait until mid to late autumn.

They're your seedlings though, so let us know what you do and how it works out. Good luck!!

Take care and happy transplanting!
Grant

They are small. Will wait for cooler temps and try to move a couple.

Thanks

Fun! Let us know what you do, and when, and how it works out. Good luck!