The most eco-friendly Christmas tree is one that lasts for years. Here’s how to choose, decorate, and care for a living tree
Picea pungens ‘Hoopsii’. ‘Glauca is the standard Colorado blue spruce, but ‘Hoopsii’ is even bluer. It its best in colder areas; a poor choice in Puget Sound region where lack of winter cold leads to severe aphid infestations.
Grows 30 to 60 feet tall in gardens. Zones A2, 3, 1-10, 14-17.