I strongly disagree with putting your Norfolk Island Pine tree outdoors as you must live in a cold zone as you mentioned snow. This tropical plant cannot survive temps below 35 degrees. It may survive in zones 10 and 11 outdoors but not if you try to grow it in a hurricane prone climate such as Florida. The wind can snap tall specimens in half.  Grow this plant as a houseplant indoors. You can let it sit on the patio in the summer but no cold drafts or blasts of warm air. It will grow quite tall if you keep transplanting it into a larger pot so to keep it dwarfed for indoor use grow it as a bonsai which means you can remove it from it's pot, trim back some of the roots and add fresh potting soil then replace back in same small container. This will stunt it's growth and needs to be done only every four to five years. Meanwhile, enjoy your indoor tree and don't forget to decorate it for Christmas. Keep growing, Marianne Binetti