What Growing Zone Is Glen St. Mary?
Our records indicate the United States Department of Agriculture has given Glen St. Mary a growing zone designation of 9a. Sometimes also called the planting or hardiness zone, this zone number gives you an idea of what plants can and cannot grow in Glen St. Mary's climate based on the average extreme annual temperature.Our data is based on the latest 2023 USDA maps, which used Glen St. Mary's weather data from 1991 - 2020 in their analysis.
Latest FL growing zone mapIf you are looking for plants suitable for growing in the Glen St. Mary area, head on over to our page on plants that grow well in Glen St. Mary, FL.
Worm Composting Kit
Complete kit for starting your own worm composting system.
Cluck Around Sign
Whimsical sign for your chicken coop area.
Seed Starting Trays
Perfect for starting seeds indoors before transplanting to your garden.
Reusable Grow Bags
Breathable fabric grow bags that promote healthy root growth for your vegetables and fruits.
Raised Garden Planter
Elevated planter for easy access and better drainage.
Latest FL growing zone mapThe growing zone is a measure of the lowest temperature that a plant can survive based on average lowest year temperatures, helping you to decide what plants would grow best in your particular climate. Since Glen St. Mary is in growing zone 9a this means that plants there can survive temperatures as low as 20 to 25 degrees Fahrenheit. Plants for Glen St. Mary's climate should be chosen with this in mind, or plants should be moved inside to keep their core temperature in the right range if necessary.
Some zones may have been changed by the USDA as of 2023. To see if the Glen St. Mary area has been affected, refer to this map of half zone changes from the 2012 version of the USDA zones to the 2023 version.
Half zone changes from 2012 to 2023The updated map shows that over half of the Southeast has warmed by about half a zone. For gardeners, that means you can now grow plants that tolerate a bit more heat and less frost than before. The tan areas reflect this shift. Meanwhile, the white areas had slight temperature changes, but not enough to move them into a new zone. In the Western U.S., a few spots shifted cooler. That’s not due to a colder climate, but because the new map uses a larger dataset, giving a more accurate picture of local conditions. It's important to keep track of these changes when planning your garden!
Hardiness Zone FAQ
Have questions about hardiness zones and what they mean for your garden? Check out our FAQ below for quick answers to common questions about USDA hardiness zones and how they affect plant selection in Glen St. Mary, FL.
The USDA hardiness zone is 9a for Glen St. Mary. This is sometimes also referred to as the growing or planting zone. These terms are used interchangeably.
Glen St. Mary's Growing Zone Details
USDA Growing Zone: 9a
Zip Codes: 32040
Longitude: -82.1604
Latitude: 30.2752
Lowest Avg Temperatures (F): 20 to 25
Brass Decorative Faucet Handle
Elegant brass handle to enhance your garden faucet.
Worm Composting Kit
Complete kit for starting your own worm composting system.
Shiitake Mushroom Kit
Grow your own delicious shiitake mushrooms at home.
Self Watering Plant Pots
Innovative pots that maintain optimal moisture levels.
Cluck Around Sign
Whimsical sign for your chicken coop area.
Map of the Glen St. Mary Area
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Metal Seed Storage Box
Organized storage solution for your seed collection.
Brass Decorative Faucet Handle
Elegant brass handle to enhance your garden faucet.
Steel Hori Hori Weeding Knife
Versatile Japanese-style gardening knife for weeding and planting.
Brass Watering Can
Elegant brass watering can with classic design and durability.
Stainless Steel Garden Tool Set
Complete garden tool set with heavy-duty stainless steel tools for all your gardening needs.
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Self Watering Plant Pots
Innovative pots that maintain optimal moisture levels.
Metal Arbor Trellis
Decorative arbor trellis for climbing plants and garden entrance.
Hydroponic Garden Grow Kit
Grow fresh herbs and vegetables year-round with this indoor hydroponic garden system.
Reusable Grow Bags
Breathable fabric grow bags that promote healthy root growth for your vegetables and fruits.
Brass Watering Can
Elegant brass watering can with classic design and durability.
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