USA plant hardiness zones (gardening zones)
Plant hardiness zones (winter frost zones or gardening zones) range for USA is:
by the USDA scale.
• coldest zone's winter temperature: −60 … −55 °F
• warmest zone's winter temperature: +45 … +50 °F
Plant hardiness zones (winter frost zones or gardening zones) range for USA is:
by the USDA scale.
• coldest zone's winter temperature: −60 … −55 °F
• warmest zone's winter temperature: +45 … +50 °F