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Oklahoma Planting Zones

Oklahoma planting zones

Oklahoma is a humid subtropical region, with a humid continental climate towards the north, humid subtropical climate in the central, southern and eastern parts of the state, and semi-arid climate in the west. Severe weather is common across the state as a result of its location in proximity to the dry and cold air that comes from Canada, hot and dry air from the southwest parts of the country and Mexico, and the moist, warm air from the Gulf of Mexico. These three regions and their vastly different air currents contribute to the thunderstorms, tornadoes and hail that are unique to virtually anywhere else in the country. The state sees on average more than 60 tornadoes a year. Winters are the driest season across all of the state, with spring precipitation peaking in May. Summer average temperatures are 79 degrees and winter is about 39 degrees. 

Oklahoma growing zones range from 6a to 8a. Growing zones are also known as planting zones and they help gardeners determine what flowers, plants or vegetables thrive in a specific region. Quickly find your Oklahoma growing zone using Gilmour’s Interactive Planting Zone Map. Zones let us know which plants are most suited to survive winter conditions. They guide on both what to plant, as well as when to plant, too. Oklahoma planting zones are based on first and last frost dates. Keep in mind that when planting a garden, only use plants rated for the Oklahoma planting zone you are in or lower. For example, if you are planting in zone 6a, choose plants rated zones 1 through 6, not higher. This helps make sure plants can survive the winter conditions of the zone. 

There are many flowers and plants that grow well throughout the state of Oklahoma. Use the hardiness zones as a guide, as it is the best chance to grow plants that will thrive. Rudbeckias, peonies, daylilies, shasta daisies, zinnias and garden phlox all grow with ease. Kale, lettuce, chard, snow peas, herbs and summer squash grow very well throughout the state.

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