What are Cold Hardiness Zones? Which zone applies to Fort Collins?
The USDA Cold Hardiness Zone Map delineates the average minimum low temperature for all regions of the US. Most of Fort Collins falls into zone 5 where the minimum temperature range is from -20 to -10 degrees (Fahrenheit). Although temperature tolerance is only one measure of a plant’s hardiness, it does give the gardener a basis for selecting suitable plants for the garden. Nursery stock is tagged with planting instructions, soil, light, and moisture requirements, as well as a range of suitable growing zones. Garden catalogues usually include the range of zones applicable to each plant. Remember that microclimates exist that may have temperatures higher and lower than the average.
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