Savor the Season
Fall is not only one of the best times to buy plants, generally when prices are marked to move them out, but the combination of cooler nights and warm days, make great "settling in" conditions before the plants go to sleep. It's less stressful for the plants.
Shrubs and trees benefit from fall planting. You can plant up until the ground freezes (don't wait that long though :) Roots will have time to stretch and settle during September and October (and sometimes November). Think about these native shrub and tree choices from CT Botanical Society, Doug Tallamy, Pollinator Pathway, Xerces, and UConn Arboretum. See these resources for more choices:
Chestnut Oak (Q. montana)
White Oak (Querus alba)
Mapleleaf viburnum (Viburnum acerifolium L.)
Serviceberry (Amelanchier sp.)
Highbush Blueberry (Vaccinium corymboson)
Pussywillow (Salix discolor)