Growing dwarf conifers is our speciality!     Home 'Sterling' Selections Latest Catalog With more Photos! Retail Stores Affiliations USDA Zones  FAQs Links About Us GROWTH PER YEAR Miniature........ less than 3� Dwarf............ 3-6� Intermediate..... 6-12� Large............ more than 12�

Hardiness Zones Picea pungens 'Walnut Glen' The map of United States has been divided into hardiness zones based on ten degree Farenheit difference in annual average minimum temperature. This map can help you choose the plants that will perform best in your garden. The USDA Map is shown below:   Zones Zone 1 (below -50 degrees F) Zone 2 (-50 to -40 degrees F) Zone 3 (-40 to -30 degrees F) Zone 4 (-30 to -20 degrees F) Zone 5 (-20 to -10 degrees F) Zone 6 (-10 to 0 degrees F) Zone 7 (0 to 10 degrees F) Zone 8 (10 to 20 degrees F) Zone 9 (20 to 30 degrees F) Zone 10 (30 to 40 degrees F) Please prune the dwarf Blue Spruce to return to the top. Copyright © Blue Sterling Nursery 1997-2011 All rights reserved. All photos copyright by Jim Smith and may not be used in any manner without the authors written consent.