United States Hardiness Zone Map - Perennials - Denver Plants

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United States Hardiness Zone Map
Courtesy of the United States Department of Agriculture

Temperatures are average annual minimum low for each zone.

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

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