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I'd check it's got some roots at all first Wahaj...Looks nice with the baubles.
I've bought quite a few small living Christmas trees over the years, including blue spruce. Although they are very slow growing, if you want to keep it manageable, do put it in a bigger pot. I mixed mine with good compost and it's original soil and it has flourished this year. If you don't have a large garden, I certainly wouldn't plant it out. Also, you can prune it to shape quite easily but remember, as with any tree, when you cut the main shoot, it doesn't grow a great deal higher. I would just let it grow to about a foot lower than you want it to grow after a few years.You've got a lovely little tree, just rush it outside on the 6th January and it will keep going!