A hardiness zone is a geographic area with a similar average minimum temperature. The map is based on the average annual extreme minimum temperature, so people in those areas know which plants can ...

You can use the USDA's interactive map to find the plant hardiness in your Wisconsin zip code. What are the best spring plants for Milwaukee? Milwaukee falls into zone 6a for plant hardiness ...

If you are wondering whether that shrub, flower, or tree that you saw in a magazine or catalog will grow well in your garden, using a hardiness zone map is your best bet to ensure success.