Answer: If plants are on sale now, I'd go ahead and purchase them. Late summer and early fall are actually good times to plant! Just be sure to water them deeply once each week until fall rains take over for you.
Tall, evergreen shrubs would be first on my list: Arborvitae ?Green Giant? (Thuja ?Green Giant?) Introduced by the U.S. National Arboretum. Grow in almost any soil conditions, from sand to clay. Pyramid shape and requires no pruning. Pest resistant, even deer resistant. For a quick hedge or windbreak, plant 5 - 6' apart. For a more gradual hedge, plant 10 - 12' apart. Fast growers. Prune to shape, before spring growth. USDA Zones 2 - 10, H - 60', S - 20', Full sun.
Leyland cypress (Cupressocyparis leylandii) are another choice. These are fast-growing evergreens that grow up rather than out. If a Leyland cypress likes where it is, it can easily put on three or four feet--or more--in a single season. The usual color seen in the marketplace is dark green--that's perfectly fine, but there are also plenty of other colors--bluish-green ('Naylor's Blue'), gold ('Castlewellan Gold'), gray ('Haggerston Grey') and bright green ('Moncal').
Best wishes with your new plants!
Q&A Library Searching Tips