About the USDA Hardiness Zones The USDA Plant Hardiness Zone Map is a valuable agricultural and horticultural reference. Most of the larger countries of the world have their own version of a hardiness map. Then match that color to the color on the legend. USDA Hardiness zones 1 and 2 comprise of the southern reaches of Canada, Alaska and a small part of northern Minnesota. The state has a huge range in terms of precipitation and rainfall as well. Agricultural Research Service, U.S. Department of Agriculture. State-by-state maps, along with an electronic system that allows finding the zone for a particular zip code, can be found at the USDA Agricultural Research Service (USDA-ARS) website.. USDA Hardiness Zones (cold). View Map. View Map. The map is based on the average annual minimum winter temperature, divided into 10-degree F zones. What are hardiness Zones? The two most commonly referenced hardiness zone maps are those produced by the U.S. Department of Agriculture (USDA) and Natural Resources Canada (NRC). The first set of numbers, in this example 3-8, is the cold hardiness zone range and the second set, 8-1 in this example, is the heat zone range. span a wide range from 4b to 10b. Pinterest. Vegetable gardening in Arizona can be challenging. 3-8, 8-1. USDA Plant Hardiness Zone Map. And it’s exactly this reason why the plant hardiness zones and your regional climate is so important! The US Department of Agriculture divided out the map of the US in areas which range from planting zone 1A to planting zone 13B. This introduces a new array of plants that can grow comfortably in your garden while also denying a few old favorites. Some tags are now show-ing both the USDA Hardiness Zone and the Heat Zone, e.g. The zones do not incorporate summe Arizona Plant Hardiness Zone Map. 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Hardiness Zones Hardiness zone maps are not very detailed and do not accurately show hardiness zones in much of the West due to elevation and microclimate variations. USDA Arizona Plant Hardiness Map Gardening Zone. The warmer zones of the US, including zones 8, 10, 11, are in the southern half of the country and also the lower Pacific and Atlantic Coast while the cooler zones which include zones between 7 and 4 are on the northern and central parts of the country. Zones in the new map are based on 1976–2005 weather data. Arizona is mainly known for its high temperatures and arid climate. Some nurseries show the Sunset Western Garden Zones on their display signs. ZONE 3A: Mild areas of mountain and intermountain climates. Planting a garden of fruits, vegetables, plants or flowers in Arizona may seem tricky, but when you know the hardiness zone of the specific region to be planted, it is a much easier process. Cool season crops could include beets, cabbage, onions and radish. 30°F to 35°F. Zone 10a. Within miles of each other, higher altitudes in the mountains and coastal areas of Arizona can be 2-3 zones cooler than urban and desert areas. We further subdivide each zone into a or b subzones. Reputable nurseries will clearly mark the hardiness zone for any plant that that they have for sale. Arizona Hardiness Zones. Learn everything you need to know about drought tolerant landscaping, including the best type of plants. USDA Zones 4b through 10b are represented in Arizona. Planting zones or growing zones are illustrated on a map known as the USDA Plant Hardiness Zone Map. Arizona has an arid to semi-arid climate, but even despite this difference, overall the state is known for its mild winters and extreme heat in the summer months at the lower elevations. The most appropriate grass type for zones 1 and 2 are bluegrasses. In Canada, we break our geography down into nine hardiness zones: with the harshest being 0 and the mildest being 8. 3-8, 8-1. Within miles of each other, higher altitudes in the mountains and coastal areas of Arizona can be 2-3 zones cooler than urban and desert areas. Looking for Arizona planting zones? USDA Plant Hardiness Zone Map. you are in, it is easier to decide what to plant. Information from the zone map helps gardeners to compare their garden climates and determine what plants will grow in their area. This zones map took into account the current climate change and warmer temperatures experienced by most of the United States. USDA Hardiness Zones. USDA Hardiness Zone 8 (10 to 20 degrees Fahrenheit) includes coastal North Carolina, South Carolina, New Mexico, Washington and Oregon, southern Nevada, Arizona, Arkansas, Mississippi, Alabama, Georgia and Texas, most of Louisiana, northern Florida, as well as many parts of California. While perhaps not quite intuitive at first, the hot dry climate of the state actually is good for growing several vegetables, including tomatoes, chilies and peppers, eggplant and other crops. Using the zone system will help gardeners in Arizona climate zones to be more successful in their landscaping efforts. The purpose of these hardiness zones is to identify how well plants will withstand the cold winter temperatures of these zones. Average winter minimums range from 32 to 23°F (0 to –5°C). The 1990 USDA Hardiness Zone Map This webpage was originally based on the 1990 USDA Hardiness Zone Map, which is one of several maps developed to provide this critical climate information. Planting zones define, generally, which plants can survive winter in your area, and the zones are typically listed in plant growing guides for reference. Read on to learn about growing Arizona ash trees. Arizona's winters are too cold for this palm. Planting calendars for places in Arizona. USDA Hardiness Zones (cold). For example, the average low temperature in zone 3 is -40 to -30 degrees Fahrenheit, while the average low temperature in zone 10 is +30 to +40 degrees Fahrenheit. Let’s face it, the only hardiness zone we’re usually interested in is our own. Facebook. Gardeners use hardiness zones to know what category of plant is capable of growing in a particular area. The USDA Plant Hardiness Zone Map (PZHM) was developed using minimum temperature data and the most recent version was released just weeks ago. First developed by the United States Department of Agriculture (USDA) as a rough guide to landscaping and gardening, a hardiness zone is a geographically defined area in which a plant is capable of growing and withstanding the minimum temperatures of the zone. Winter temperatures rarely dip below the low 60s during the daytime hours and can soar for days on end into the triple digits. 03 of 54. The higher the zone number, the warmer the area. Some nurseries show the Sunset Western Garden Zones on their display signs. Plant Hardiness Zones are based on average annual low temperatures using 10 degree increments. USDA Hardiness zones in Arizona range from 4b to 10b (Fig. Below is the map for Arizona. The zones define a minimum range of temperatures that a plant or tree can survive safely in that zone. The first set of numbers, in this example 3-8, is the cold hardiness zone range and the second set, 8-1 in this example, is the heat zone range. When looking at this map, please be aware that the USDA Arizona planting zone map above is based on the 2012 USDA hardiness zone map. The USDA map is the one most gardeners in the eastern United States rely on, and the one that most national garden magazines, catalogs, books, websites and nurseries currently use. Hardiness Zones are helpful in deciding which Trees and Plants will survive in an particular area. Residents of Flagstaff, Arizona live in zone 6a, where After all, gardening in desert-like Arizona is quite a bit different than, say, tropical Florida or chilly New Hampshire. Ironwood, prickly pear, desert willow and sunflowers all tend to do well in the central region of the state. Source Natural Resources Canada. You’ve come to the right place! The original and most widely used system, developed by the United States Department of Agriculture (USDA) as a rough guide for landscaping and gardening, defines 13 zones by annual extreme minimum temperature. The USDA zones were created to help gardeners understand what will grow best in their garden. Higher elevation areas will experience cold winters, but summer heat will be much milder and more tolerable. Zones 1 and 2. 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