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I have overwintered boxwoods (buxus microphylla, the "Korean boxwood" cultivar, as well as American and English boxwood -- (Buxus sempervirens "Arbvorescens" and Buxus sempervirens "suffruticosa") here in Va. (zone 7) outdoors with only a 6-7 inch mulch on the roots and a wind break for the last 10 years. They haven't had a problem. The foliage can bronze a bit in really cold weather, like 10 F and below, but it greens up come spring.

The issue is what kind of boxwood you have. Boxwood cultivars sold as landscape material in your area are entirely winter hardy. If you purchased the boxwood you have from a mallsai vendor there is a chance it could be Buxus harlandii, which isn't very winter hardy.

If you bought the plant from a local landscape nursery, it should be fine. I would not put any boxwood in a dark garage for the winter. You're asking for trouble if you do that.

12-Dec-2007	#5
rockm bonsaiTALK ArchMaster Join Date: Oct-2003 Location: Fairfax, Va Country: USA USDA Zone: 7 AHS Heat Zone: ? Posts: 4,561	I have overwintered boxwoods (buxus microphylla, the "Korean boxwood" cultivar, as well as American and English boxwood -- (Buxus sempervirens "Arbvorescens" and Buxus sempervirens "suffruticosa") here in Va. (zone 7) outdoors with only a 6-7 inch mulch on the roots and a wind break for the last 10 years. They haven't had a problem. The foliage can bronze a bit in really cold weather, like 10 F and below, but it greens up come spring. The issue is what kind of boxwood you have. Boxwood cultivars sold as landscape material in your area are entirely winter hardy. If you purchased the boxwood you have from a mallsai vendor there is a chance it could be Buxus harlandii, which isn't very winter hardy. If you bought the plant from a local landscape nursery, it should be fine. I would not put any boxwood in a dark garage for the winter. You're asking for trouble if you do that.