Potted Turkish boxwood topiaries ( Buxus spp . ) promptly become a gardener ’s gem , as they add together interest and versatility to entree , patio and other garden features . you’re able to keep your box topiary alert and well by establish attention to a few item to protect your plant before wintertime weather sets in .
Potted vs. In-ground Boxwoods
aboriginal to southern Europe , North Africa and westerly Asia , boxwood ( genus Buxus sempevirens ) turn in the U.S. Department of Agriculture plant hardiness zones 6 through 10a . These boxwoods exit out in hot summer position , but the " Green " serial , crosses between genus Buxus sempervirens and Buxus microphylla koreana , suffer a wider mountain chain of temperatures , growing in USDA zone 6a through 10b , according to the New Sunset Western Garden Book . The hardiness of potted plants deviate , somewhat , due to the increase exposure of a plant ’s root system to colder temperature . There can be as much as a two - zone difference in the hardiness of potted plants versus in - solid ground plants , mention the Brooklyn Botanic Garden .
Containers for Winter Weather
container are one of the primary thoughtfulness when organize your box for winter in any mood . Terra cotta and concrete grass absorb moisture , which can crack the muckle in locations where freezing temperature come . wrap pots in bubble paper or plastic - lined burlap can foreclose this eccentric of winter damage . However , the most long-lived pots for winter atmospheric condition are fiberglass , iron , wind , enceinte plastic and stone , according to ok Gardening .
Winter Culture
All a Turkish boxwood industrial plant needs for wintertime care is a nerveless , frost - free post , tell Horticulture magazine . In milder climates , USDA hardiness zone 8 and tender , container - grown industrial plant require very little wintertime care other than shelter from cold wind and harsh winter sun . Overwatering can kill boxwoods ; however , they should not completely dry out out during the wintertime . Check your dormant boxwood monthly , and water them before they whole dry out out .
Avoid Potential Problems
box exposed to wintertime sun can develop cambium activity too ahead of time in the time of year , consort to the North Carolina Cooperative Extension Service . If this early growth of bark tissue is conform to by harsh weather , your topiary can be damaged . Winter bronzing is also a common problem of boxwoods . Orangish- or brownish - colored foliage can be due to low fertility , low pH and drying out during wintertime . To prevent wintertime box bronzing , keep your topiary out of malarkey , topdress potted Turkish boxwood with an inch of organic mulch in the spring to ply nutrient , and maintain soil pH of 6.5 to 7.2 by adding lime when a land trial indicate the potting soil is too acidulous — a precondition which can occur when ground true pine bark or other acidic mulch is used .
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