These gift trees, from the National Arbor Day Foundation, can be grown indoors or outdoors or even preserved in the refrigerator until you are ready to plant them. The trees are only $3 each, but there is a minimum order of 10. You can select from four evergreens: Ponderosa Pine, Coastal Redwood, Longleaf Pine, and Colorado Blue Spruce. They come in a recyclable “polytube” which has instructions for planting. They’re available from: National Arbor Day Foundation
Thanks to Inhabitat for this tip.