That kind of depends on how likely you are to forget them and how much root surgery they are going to need.

A potted tree with a good root system can be planted any time of year, if you water it enough.

If the roots are such that you would need to do a lot of corrective surgery, I would wait until the trees are dormant, Nov-Dec. I usually keep stuff I buy in spring until fall so I can bare root them. Even if they have good roots, I like to remove the bark that they're in and get them in good TN clay LOL.

double check in the fruit forum .. ken

I tend to lean towards planting things because in the ground they ave a better chance of surviving if I forget to water them.

Also if these were on sale because they have been sitting around they will just continue to deteriorate if they remain trapped in the pots for additional months.

Grafted fruit trees on fully dwarfing root stocks I wouldn't worry too much about repairing the roots of, a small inadequate root system is what causes full dwarfing of the top in the first place. And means that such combinations often require permanent support anyway - correction of root deformities at planting will not prevent this. Also a lot of heavy, strangling main roots are not expected to be produced in this instance - it would depend on if the root stocks were left in small bands or pots too long, were very tightly wound right at the base of the trunk. In which case planting out is kind of a waste of time, as you can't do anything about it - and girdling at some point is probably inevitable.

Thanks guys. Roots don't look too bad on 3 of the 4. One of the pear might require some work. I think I'll just pant them and see. I don't have a whole lot of money on these trees, of they don't make it I can live with it.