You'll have to protect the boxwood from wind during winter. They are hardy, but they are not as hardy as Junipers in terms of cold weather. I live in Vermont, USA and have a few green velvet boxwoods being trained for 51cg. Where I live (northern VT) is considered zone 3b (no colder than ?35 ¡ãF (?37 ¡ãC)), and if I want my potted trees to survive,. the safest bet is to build a cold frame, which I am doing soon. Maybe you can consider that too? making a small cold frame for just 1 tree should be a piece of cake.
Last edit: 10 years 1 week ago by eangola.
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