My first Box balls
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- September 18, 2008 at 10:25 pm #28481
Too risky. If the containers were like whiskey barrels, with that much soil volume, you might get away with it…but life in a container in Zone 5 through the winter can be rough. Even then, I’d suggest getting them out of the wind.
I bring some of my potted woody plants into the barn for the winter, and water a little during prolonged thaws if the soil feels very dry (like maybe twice a winter). At least that way their temperature is more even, and they are not exposed to drying winds and constant heaving/thawing etc. The ideal is if the building is like 35 degrees…not so warm (40) as to get things growing, but to keep them just dormant. The box, with its evergreen foliage, would like some light…but you may not have such a spot for it.
Alternatively, I’d plunge the box in my vegetable garden each winter, either in the pot (if it can stand being buried, which would be great) and give it wind protection as well.
I was interested to see that bonsai growers discussed this in a specialty forum here (though note that some are talking about one species of box and some about another, and there is a big difference in hardiness):
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