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State Gardening
Sources
Photo: Community vegetable garden with chard, squash and staked tomato plants in summer. Gavin Anderson, CC BY-SA 2.0, via Wikimedia Commons
Frost and freeze dates
NOAA National Centers for Environmental Information, U.S. Climate Normals 1991-2020, annual and seasonal normals (version 1.0.1), freeze probability dates per station. NOAA Climate Normals.
Each county uses the station with a complete record nearest its Census Bureau 2023 Gazetteer center point. The station name, distance and elevation are shown on every county page.
Hardiness zones
USDA Agricultural Research Service and Oregon State University PRISM Climate Group, 2023 USDA Plant Hardiness Zone Map, ZIP code zone table, joined to Census 2020 ZIP code tabulation areas. planthardiness.ars.usda.gov.
Planting calendars
Tennessee
- W 346-B, Backyard Vegetables: The Tennessee Vegetable Garden – Garden Planning, Plant Preparation and Planting (UT Extension (University of Tennessee Institute of Agriculture)). W 346-B 12/15 16-0089 (printed); catalog publish date January 27, 2016. Publication file.
- SP291G, Fall Vegetable Gardens (UT Agricultural Extension Service (University of Tennessee)). SP291G-10M-3/99(Rev) (printed); catalog publish date April 05, 2018. Publication file.
Georgia
- Circular 963, Vegetable Gardening in Georgia (University of Georgia Cooperative Extension). Publication file.
- Bulletin 577, Home Gardening (University of Georgia Cooperative Extension). Publication file.
North Carolina
- AG-756-03, Western North Carolina Planting Calendar for Annual Vegetables, Fruits, and Herbs (NC State Extension). Publication date: Aug. 4, 2016. Publication file.
- AG-756-01, Central North Carolina Planting Calendar for Annual Vegetables, Fruits, and Herbs (NC State Extension). Publication date: July 8, 2016. Publication file.
- AG-756-02, Eastern North Carolina Planting Calendar for Annual Vegetables, Fruits, and Herbs (NC State Extension). Publication date: June 15, 2016. Publication file.
Texas
- EHT-077, Texas Home Vegetable Gardening Guide (Texas A&M AgriLife Extension Service). 6/14. Publication file.
Pennsylvania
- Seed Planting Guide (Penn State Extension, Master Gardeners of York County (College of Agricultural Sciences)). Publication file.
- Transplanting Guide (Penn State Extension, Master Gardeners of York County (College of Agricultural Sciences)). Publication file.
- Master Gardeners Philadelphia Planting Guide (Planting guide of vegetables grown in the Philadelphia area) (Penn State Extension, Master Gardeners of Philadelphia County). Publication file.
Ohio
- Ohio Gardening Calendar (Ohio State University Extension (CFAES)). Publication file.
Extension offices
County office names, addresses and phone numbers come from each extension service’s office directory, linked on each county page. Checked November 12, 2026.
Photos: Community vegetable garden with chard, squash and staked tomato plants in summer: Gavin Anderson, CC BY-SA 2.0, via Wikimedia Commons; Tall corn and other vegetables growing in a fenced backyard garden: Tomwsulcer, CC0, via Wikimedia Commons; Community vegetable area with brick paths, timber beds and flowering plants: David Hawgood, CC BY-SA 2.0, via Wikimedia Commons; Rows of green and red lettuce growing in wooden-edged beds with drip irrigation: SA, The Green Ark, Bostanie, CC BY 4.0, via Wikimedia Commons.