Growing Colorado Blue Spruce (Picea pungens) in a container
Colorado Blue spruces are my favorite conifer, but, I do not have a spot in my yard for a large tree. I like some of the dwarf picea pungens cultivars, but I'm having an awful hard time finding one in my area. I have some online, but they are quite expensive (I realize this is partly do to dwarfs being more expensive in general). Also, most dwarf picea pungens tend to be more mounding in form as opposed to pyramidal, which I prefer.
What I am considering is growing a regular Colorado Blue Spruce in a container. I know picea pungens is far from the best conifer for a container, but given that I have seen them used as bonsai, I assume it must be possible to grow them in a large container.
So, this is my question: If I start with a small picea pungens in a 1-gallon container, how long might I be able to contain it in a container? Would it be possible to grow it in a container indefinitely?