What Your Plant Hardiness Zone Won’t Tell You About Your Garden’s Climate

Although we can’t predict the weather, by learning more about past weather we can make a more educated guess about the future. By understanding your garden’s microclimate, you’ll be able to choose plants that will thrive in your particular neck of the woods.

Many gardeners rely on the USDA Plant Hardiness Zone Map for a quick and dirty way to decide what to plant based on their “zone.” Zones are also a favorite qualifier of some nurseries and seed companies. Be aware that your zone is only based on the average annual extreme minimum temperature. The zones were just updated in 2023 and it’s interesting to compare the changes from the previous map.

A map of Alaska indicating USDA Plant Hardiness Zones by color variation. Much of Northern and central Alaska consists of growing zones 1a to 2b, with coastal regions 2b to 4a and Southeast Alaska contains zones ranging from 4a to 7b.
map of Alaska shaded with different colors according to zone hardiness
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