Erm, I'm wondering if you mean Buxus, commonly known as Box? If you do, no you don't need to keep it frost free, it's hardy.

I think that's a great new name for it! Comely, um . . full of figure!

Made me laugh anyway, hortum cret - I guess buxom's a good description if you visualise a rounded box spilling out over the edges of a pot!

Ireland tends to have a milder winter than the island of GB, so I would assume it will be totally hardy in a pot.

Breast assured, it will survive the winter, figuratively speaking of course ;o)

Hi Jureklapot,
They are fine outside. I have 2 which have been standing on the patio for years.

Myron! LOL

I planted two buxus many years ago. When I told the nursery man I planned to put it in a pot which we had built from stone using a recycled cold water tank from the attic as a liner, he said forget the liner, allow the plant to sink deep roots so that it can access water even if there is a deep ground frost. Fingers crossed they have not been a problem. They are in a cold windy position, he recommended spraying them with the stuff you get to retain the leaves on Christmas trees brought in to the house. I only did that for the first year.