Our mission as the Arizona Native Plant Society is to help inform and educate local residents about the importance, and in our opinion, ease of planting native growing gardens whenever possible. This resource is meant to help you better understand native gardening techniques, information and other resources.

Hardiness Zones

What are Hardiness Zones, Gardening Zones, Growing Zones and Plant Zones?

Hardiness Zones, Gardening Zones, Growing Zones and Plant Zones refer to defined geographic regions that can support specific plants, flowers and trees. The zones define a minimum range of temperatures that a plant or tree can survive safely in that zone. Plant Maps provides the only interactive version of the USDA hardiness zone map available on the internet.

For a detailed interactive zone maps for Arizona, click here.You can search for the distribution of specific plants, like saguaros.

Native Plants for Pima County Landscaping

This extensively annotated list (14 pgs) of plants includes trees, shrubs, vines, perennial and annual forbs, wildflowers, and grasses, and cacti and succulents growing in the major watersheds of Pima County. Plant habitats range from hydro- to xeroriparian.

Most of the plants with low or moderate water use can be used successfully in gardens, and many are available at native plant nurseries and botanical gardens.

The list includes plant names, growth forms, and water use and also a wealth of information on natural habitat, phenology and plant and animal associations. It is the product of years of work by a number of Tucson-area naturalists.

More Resources

Maricopa Native Seed  Library

provides native residential landscaping seed

in Maricopa County

Recognizing that “many residential landscapes do not support wildlife. Instead, home landscapes tend to have low species diversity, and the plants that are there are often non-native or do not have high wildlife value”, Aznps member Danielle Carlock has helped establish a seed bank in Maricopa County to provide native species that will thrive for local homeowners.

A full story begins on page 6 of Plant Press Arizona, Summer 2021