Plant them.
Ok, since you are growing in pits, why be so aggressive? If they NEED to be uppotted, than so be it but maybe select trees, when possible, that are not at that stage. A smaller tree that does not require instant uppotting will be a healthier tree in the long run.
As for spraying chemicals, if the tree gas pests or disease, then again, so be it.. but, as with the tree size, why select trees that are coming with these issues?