Fall is a good time to plant trees and shrubs even better than spring. It is cooler and the weeds are less of a problem and you have more time to spend in the garden or landscape.
Most container plants will be root-bound this time of year. Just be aggressive and rough up the root ball so the roots will break into the surrounding soil. Just keep watered and later on before the ground freezes, mulch with a couple of inches of mulch. The keeps the ground from freezing and thawing, breaking the new roots.
Plant up to 6 weeks before the top of the ground freezes. With a mulch, you can extend the planting time to the end of October. I planted two shrub roses actually in November six years ago and they are still growing.