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Hardiness Zone

The U. S. Department of Agriculture's Plant Hardiness Zone Map provides recommended ranges that plants will grow well. Hardiness is the ability of plants to endure low temperatures. The map has eleven zones rated to identify areas where specific plants will thrive. The zones are only approximations. You may find that, due to location, altitude, weather conditions, etc. that plants rates for zones above or below your area may do well.

Zone Temperature Ranges of Annual Minimum Temperatures

  • Zone 1, below 50F
  • Zone 2, -50 to -40F
  • Zone 3, -40 to -30F
  • Zone 4, -30 to -20F
  • Zone 5, -20 to -10F
  • Zone 6, -10 to -0F
  • Zone 7, -0 to 10F
  • Zone 8, 10 to 20F
  • Zone 9, 20 to 30F
  • Zone 10, 30 to 40F
  • Zone 11 Above 40F

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