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Last fall I planted a 4-foot tall Arizona cypress (Blue Ice) in my yard. I bought it from a local nursery who assured me it was cold-hardy enough for this area, but by this spring most of the needles on the upper 2/3 of the tree had turned brown. The lower needles that were beneath the snowpack for most of the winter are still green. Is there anything I can do to help this tree recovery (or should I find a different tree that's more cold-hardy)?
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It depends on where you live. Arizona Cypress is marginally hardy on the Wasatch Front and fine in the St. George and Moab areas. Colder ares, such as Cache Valley, are not warm enough for the species to survive. It is hardy to 0 to degrees F at best. If you are in a warmer area, many other things could have potentially killed the plant, including improper planting and watering.
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