It is likely probably root bound and has been lacking essential nutrients; or the roots have been allowed to dry out for extended times. The roots of pot bound nursery stock can cause roots to rot, or it can cause nutrient problems. This is likely the reason its leaves are turning brown. (root problems)Red maples are hardy trees. If it is growing or the limbs are live underneath the bark, it might be fine.
Planting the tree properly using 50% topsoil and 50% clay is my advice for the next step. (they like slightly acidic soil) Planting depth is vital as the roots are usually shallow on Maples. Plant the tree with the roots spread out evenly and the **root collar at ground level. Mulch the newly planted tree well and water it regularly.
I'd plant it as soon as possible.
Last edited by mission; 09/28/11 04:50 AM.
