Going off at a slight tangent from your question, I have a miniature Christmas tree which I bring in from the garden year after year. As far as I recall, I bought it from Waitrose for about £3.99, several years ago.
It has the Latin name of Chamaecyparis thyoides or simply white cypress / cedar.
They are only about a foot high and make an ideal centerpiece for a table. The pot they come in has no hole in the bottom and it will live for only a few weeks before drowning, this is easilly remided by transplanting it in a (slightly bigger) pot of your own.
I've just brought mine into the house to day, and its only a few inches taller than it was, several years ago. potted on into larger pots, about every 2nd year.