Growing season in Maryland Maps show shifting planting zones
Discover the unique planting zones of Maryland in this comprehensive guide. Learn about the different climate conditions, suitable plants for each zone, and tips to maximize your gardening success. Ideal for novice gardeners and expert horticulturists alike.
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Plants that thrive in USDA zones 7a and 7b include rosemary (Rosmarinus officinalis), which grows best in USDA zones 6 through 9, and hyacinths (Hyacinthus spp.), which are hardy in USDA zones 4 through 9. Rosmarinus officinalis Rosmarinus officinalis More in Plants →
Maryland Interactive USDA Plant Hardiness Zone Map Plant hardiness
Maryland Hardiness Zones are defined by the U.S. Department of Agriculture (USDA) Agricultural Research Service (ARS). The zones in this map were created in 2023 using mean extreme climate data covering the period of 1991 to 2020. The previous version of this map released in 2012 and covering data from the period of 1976-2005 can be found here
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USDA zones are based on a 30-year average of the lowest winter temperatures, or an average of the coldest night of each year, at specific locations. That's an important factor for gardeners, as only one cold night can spell trouble for tender plants. Each growing zone is divided by 10-degree Fahrenheit increments and each half-zone is divided.
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New USDA Hardiness Zone Map for Illinois. "The magnitude of change in the new maps really surprised me since it just reflects the last 30 years," says Illinois State Climatologist Dr. Trent Ford. The updated maps were released on November 15 and are the first update since 2012. They represent data from 1991-2020 collected by 13,412 weather.
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The USDA Plant Hardiness Zone Map is the standard by which gardeners and growers can determine which perennial plants are most likely to thrive at a location. The map is based on the average annual extreme minimum winter temperature, displayed as 10-degree F zones and 5-degree F half zones.
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Below, here's a list of 54 USDA hardiness / growing zone maps for the US states and a selection of territories and districts. To read each map, click on the picture or header to see the full-size map. Look for the color-coded legend of zones, and match up the correct color and zone to where you live. You can then choose plants suggested for.
USDA Hardiness Zone Map
Hardiness zones, sometimes referred to as "growing zones" or "planting zones", were created by the USDA to help gardeners determine which plants are best suited for a particular location. Maryland encompasses 4 hardiness zones. They are zones 5, 6, 7 and 8.
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Planting anything rated for a higher defined zone is not a good idea, as plants that will thrive in higher zones most often cannot survive the colder winter conditions of a lower Maryland planting zone. Many plants and flowers will do well in Maryland.
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Precipitation. Maryland's average annual rainfall is an ample 44 inches and ranges from 37 inches in the Cumberland area to 48 inches in the Allegheny Plateau. The precipitation distribution is even over the year with a peak during the summer. Snowfall ranges from 5-15 inches on the eastern shore to 30-40 inches in the western highlands.
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Check out our Plants Database. The USDA Hardiness Zone Map divides North America into 11 separate planting zones; each growing zone is 10°F warmer (or colder) in an average winter than the adjacent zone. If you see a hardiness zone in a gardening catalog or plant description, chances are it refers to this USDA map.
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Zone 6 plants include coneflowers, daisies, hostas, and more. Kelly sees zone 7 plants and finds out she can plant marigolds, black-eyed Susans, cosmos, and others. Zone 8 plants include strawberries, rosemary, hibiscus, and others. TIME TO GET PLANTING! "Now I've got what I need to start planting a successful garden!
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The USDA Plant Hardiness Zone Map is divided into two categories: the warmest zone is Zone 10a and the coldest zone is Zone 1b. Zone 7a is a relatively warm zone, but it is not the warmest. It is located in the middle of the map, which means that Maryland gardeners can expect to experience both hot and cold temperatures during the year.
Hardiness Zone Map Maryland
The planting zone map is based on the average annual minimum winter temperature, and which varieties of flowers and plants can survive and thrive in those conditions. There are a total of 11 growing zones in the United States as defined by the USDA, of which 8 are located in the lower 48 states. How Do I Find Out What Growing Zone I Live In?
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5°F to 10°F + - Leaflet | ©Plantmaps ©OpenStreetMap Contributors Based on the 1990 USDA Hardiness Zone Map, this interactive version covers the state of Maryland which ranges from USDA Zone 5b to USDA Zone 7b. 1990 USDA Hardiness Zone Maps for Neighboring States and Provinces Related Maryland Maps:
a map of the southern united states with different areas labeled in
Most gardeners use the USDA Hardiness Zone Map to determine what plants thrive in a specific location. The map is based on the average annual minimum winter temperature, divided into 10-degree F zones. Below is the map for Maryland. Maryland is known for its humid summers and cool winters. The eastern region is influenced by the Chesapeake Bay.