Colorado blue spruce trees are valuable in deer country, as their prickly texture and strong aroma render them conveniently deer-resistant. In the snowy North, where landscapes can look barren in winter, evergreens such as Colorado blue spruce trees can provide much-needed winter interest. Speaking of winter, a growing trend is to buy them live (in containers) for indoor Christmas decorating, then plant them outside as landscape plants after the holiday. Dig the hole in the ground for planting well before December, so you won't have to dig through frozen dirt. Bring the excavated dirt inside, to keep it from freezing; you'll need to keep it loose so that you'll have workable dirt with which to fill in around the new specimen after planting it in its hole.