website
Alternaria leaf spot of brassicas guidance — University of Maryland Extension
University of Maryland Extension
Visit Source
Research-based source imported with the national garden problem starter library.
website
Angular leaf spot of cucurbits guidance — University of Minnesota Extension
University of Minnesota Extension
Visit Source
Research-based source imported with the national garden problem starter library.
website
Anthracnose of vegetables guidance — University of Maryland Extension
University of Maryland Extension
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Research-based source imported with the national garden problem starter library.
website
Aphids guidance — University of Minnesota Extension
University of Minnesota Extension
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Research-based source imported with the national garden problem starter library.
website
Apple maggot guidance — University of Minnesota Extension
University of Minnesota Extension
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Research-based source imported with the national garden problem starter library.
website
Apple scab guidance — University of Minnesota Extension
University of Minnesota Extension
Visit Source
Research-based source imported with the national garden problem starter library.
website
Asparagus beetle guidance — University of Minnesota Extension
University of Minnesota Extension
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Research-based source imported with the national garden problem starter library.
website
Aster yellows guidance — University of Minnesota Extension
University of Minnesota Extension
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Research-based source imported with the national garden problem starter library.
website
Bacterial soft rot guidance — University of Maryland Extension
University of Maryland Extension
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Research-based source imported with the national garden problem starter library.
website
Bacterial speck of tomato guidance — University of Maryland Extension
University of Maryland Extension
Visit Source
Research-based source imported with the national garden problem starter library.
website
Bacterial wilt of cucurbits guidance — University of Minnesota Extension
University of Minnesota Extension
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Research-based source imported with the national garden problem starter library.
website
Birds (seed and fruit feeders) guidance — USDA APHIS Wildlife Services
USDA APHIS Wildlife Services
Visit Source
Research-based source imported with the national garden problem starter library.
website
Black knot of plum and cherry guidance — University of Minnesota Extension
University of Minnesota Extension
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Research-based source imported with the national garden problem starter library.
website
Black rot of crucifers guidance — University of Minnesota Extension
University of Minnesota Extension
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Research-based source imported with the national garden problem starter library.
website
Brown marmorated stink bug guidance — USDA NIFA / StopBMSB
USDA NIFA / StopBMSB
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Research-based source imported with the national garden problem starter library.
website
Brown rot of stone fruit guidance — University of Minnesota Extension
University of Minnesota Extension
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Research-based source imported with the national garden problem starter library.
website
Cabbage looper guidance — University of Minnesota Extension
University of Minnesota Extension
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Research-based source imported with the national garden problem starter library.
website
Cabbage maggot guidance — University of Minnesota Extension
University of Minnesota Extension
Visit Source
Research-based source imported with the national garden problem starter library.
website
Cedar-apple rust guidance — University of Minnesota Extension
University of Minnesota Extension
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Research-based source imported with the national garden problem starter library.
website
Cercospora leaf spot guidance — University of Maryland Extension
University of Maryland Extension
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Research-based source imported with the national garden problem starter library.
website
Choanephora wet rot guidance — University of Minnesota Extension
University of Minnesota Extension
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Research-based source imported with the national garden problem starter library.
website
Clubroot of brassicas guidance — University of Minnesota Extension
University of Minnesota Extension
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Research-based source imported with the national garden problem starter library.
website
Codling moth guidance — University of Minnesota Extension
University of Minnesota Extension
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Research-based source imported with the national garden problem starter library.
website
Colorado potato beetle guidance — University of Minnesota Extension
University of Minnesota Extension
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Research-based source imported with the national garden problem starter library.
website
Common bacterial blight of beans guidance — University of Maryland Extension
University of Maryland Extension
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Research-based source imported with the national garden problem starter library.
website
Common bean rust guidance — University of Minnesota Extension
University of Minnesota Extension
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Research-based source imported with the national garden problem starter library.
website
Companion Planting & Botanical Pesticides: Concepts and Resources
NCAT / ATTRA Sustainable Agriculture
Visit Source
Broader sustainable-agriculture companion planting resource. Use for background concepts and further reading rather than precise Louisiana planting instructions.
website
Companion Planting in Home Gardens
University of Minnesota Extension
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General home-garden companion planting source for space use, beneficial arrangements, vegetables, flowers, and practical garden planning.
website
Corn earworm / tomato fruitworm guidance — University of Maryland Extension
University of Maryland Extension
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Research-based source imported with the national garden problem starter library.
website
Corn smut guidance — University of Maryland Extension
University of Maryland Extension
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Research-based source imported with the national garden problem starter library.
website
Cottontail rabbits guidance — University of Maryland Extension
University of Maryland Extension
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Research-based source imported with the national garden problem starter library.
website
Creating a Biodiverse Vegetable Garden
University of Vermont Extension
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Useful for pollinator, biodiversity, flowers, herbs, and beneficial-insect framing around vegetable gardens.
website
Cutworms guidance — University of Minnesota Extension
University of Minnesota Extension
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Research-based source imported with the national garden problem starter library.
website
Diamondback moth guidance — University of Minnesota Extension
University of Minnesota Extension
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Research-based source imported with the national garden problem starter library.
website
Downy mildew guidance — University of Maryland Extension
University of Maryland Extension
Visit Source
Research-based source imported with the national garden problem starter library.
website
Early blight of tomato and potato guidance — University of Minnesota Extension
University of Minnesota Extension
Visit Source
Research-based source imported with the national garden problem starter library.
website
Fire blight guidance — University of Minnesota Extension
University of Minnesota Extension
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Research-based source imported with the national garden problem starter library.
website
Flea beetles guidance — University of Minnesota Extension
University of Minnesota Extension
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Research-based source imported with the national garden problem starter library.
website
Florida Vegetable Gardening Guide
University of Florida IFAS Extension
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Comprehensive Florida vegetable gardening guide with crop recommendations and planting schedules for north, central, and south Florida. Used as supporting evidence for crop suitability in USDA Zones 10a through 11b. Exact timing varies by local Florida planting region and seasonal conditions.
Secondary frost-date and garden-planning reference providing estimated last spring frost, first fall frost, frost-free growing season, seed-starting dates, transplant timing, and suggested planting windows based on a selected U.S. state and optional USDA hardiness zone. The page cites USDA Plant Hardiness Zone Map data and National Weather Service frost and freeze guidance. Treat results as historical estimates rather than forecasts, and prioritize ZIP-level climate data
website
Fungus gnats guidance — University of Maryland Extension
University of Maryland Extension
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Research-based source imported with the national garden problem starter library.
website
Fusarium wilt guidance — University of Maryland Extension
University of Maryland Extension
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Research-based source imported with the national garden problem starter library.
website
Gardening with Companion Plants: Home Garden Series
Washington State University Extension
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Use for scientifically cautious companion planting framing, integrated pest management language, and avoiding unsupported magic-companion claims.
spreadsheet
GardeningByZone — Free Planting Calendar by ZIP Code
EPM Labs, LLC
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Secondary gardening reference providing ZIP-code and USDA-zone-specific planting calendars for vegetables, herbs, and flowers. Includes recommended dates for starting seeds indoors, transplanting outdoors, and direct sowing based on average spring and fall frost dates. Use as a supporting comparison source; prioritize Louisiana-specific Cooperative Extension guidance when recommendations differ.
website
Gray mold / Botrytis rot guidance — University of Maryland Extension
University of Maryland Extension
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Research-based source imported with the national garden problem starter library.
website
Groundhog / woodchuck guidance — University of Maryland Extension
University of Maryland Extension
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Research-based source imported with the national garden problem starter library.
website
Gummy stem blight / black rot of cucurbits guidance — University of Minnesota Extension
University of Minnesota Extension
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Research-based source imported with the national garden problem starter library.
website
Harlequin bug guidance — University of Maryland Extension
University of Maryland Extension
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Research-based source imported with the national garden problem starter library.
website
Herbs Make Good Plant Partners and Companions
Penn State Extension
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Useful for herb companion/support plant guidance, especially herbs near vegetables, pest pressure, and beneficial insect framing.
pdf
Home Gardening in Hawaii
University of Hawaiʻi College of Tropical Agriculture and Human Resources
Visit Source
Detailed home vegetable gardening publication for tropical Hawaiʻi conditions. Identifies consistently successful crops, crops best limited to cool periods or higher elevations, and crops challenged by heat, pests, disease, or lack of winter dormancy. Used for general suitability guidance in USDA Zones 12a through 13b.
website
Imported cabbageworm guidance — University of Minnesota Extension
University of Minnesota Extension
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Research-based source imported with the national garden problem starter library.
website
Japanese beetle guidance — USDA APHIS
USDA APHIS
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Research-based source imported with the national garden problem starter library.
website
Late blight of tomato and potato guidance — University of Maryland Extension
University of Maryland Extension
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Research-based source imported with the national garden problem starter library.
pdf
Louisiana Vegetable Planting Guide
LSU AgCenter
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Initial public crop and planting-window source for Louisiana gardening app.
website
Mexican bean beetle guidance — University of Maryland Extension
University of Maryland Extension
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Research-based source imported with the national garden problem starter library.
pdf
Mississippi Vegetable Gardener's Guide
Mississippi State University Extension Service
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Comprehensive Mississippi home vegetable gardening guide, revised in 2025. Includes garden planning, crop selection, planting dates, cultural guidance, pest management, and harvest information. Useful as supporting evidence for warm-climate crop suitability and planting guidance across Mississippi planting regions and USDA Zones 7 through 9.
website
Onion maggot guidance — University of Minnesota Extension
University of Minnesota Extension
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Research-based source imported with the national garden problem starter library.
pdf
OSU Ohio Gardening Calendar
Ohio State University Extension
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website
Peach leaf curl guidance — Penn State Extension
Penn State Extension
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Research-based source imported with the national garden problem starter library.
website
Phytophthora blight and root rot guidance — University of Maryland Extension
University of Maryland Extension
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Research-based source imported with the national garden problem starter library.
website
Planning a Garden
Clemson Cooperative Extension
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South Carolina home vegetable garden planning guide with regional planting charts for cool- and warm-season crops. Includes spring and fall planting periods and distinguishes planting recommendations among South Carolina gardening regions. Useful for confirming crop suitability and seasonal limitations in USDA Zones 7 through 9.
website
Planting Guide for Home Gardening in Alabama
Alabama Cooperative Extension System
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Research-based home vegetable gardening guide for Alabama. Includes recommended planting periods, adapted varieties, site preparation, fertilization, and pest-management guidance. Useful as supporting evidence for warm-temperate USDA zones, especially Zones 7 through 9. Regional planting dates should still be adjusted for local frost conditions.
website
Planting the Vegetable Garden
University of Minnesota Extension
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website
Plantwise - Free Planting Calendars for Every USDA Zone
Plantwise
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Secondary gardening reference providing zone-based planting calendars, seed-starting schedules, frost-date guidance, crop growing requirements, and companion-planting information. PlantWise states that its data is compiled from USDA hardiness-zone information, NOAA Climate Normals, and Cooperative Extension sources. Use as a supporting comparison source; prioritize Louisiana-specific Extension guidance when local recommendations differ.
website
Plum curculio guidance — University of Kentucky Extension
University of Kentucky Extension
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Research-based source imported with the national garden problem starter library.
website
Powdery mildew guidance — University of Maryland Extension
University of Maryland Extension
Visit Source
Research-based source imported with the national garden problem starter library.
website
Recommended Variety List for Southcentral Alaska
University of Alaska Fairbanks Cooperative Extension Service
Visit Source
Research-based variety and crop guidance for Alaska's short, cool growing season and cold soils. Identifies cool-season vegetables that thrive, warm-season vegetables that struggle in unprotected gardens, and crops that benefit from high tunnels, low tunnels, greenhouse cover, or clear polyethylene. Used conservatively for general crop suitability in USDA Zones 1a through 3b.
website
Root-knot nematodes guidance — University of Maryland Extension
University of Maryland Extension
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Research-based source imported with the national garden problem starter library.
website
Seedling damping-off guidance — University of Minnesota Extension
University of Minnesota Extension
Visit Source
Research-based source imported with the national garden problem starter library.
website
Septoria leaf spot guidance — University of Maryland Extension
University of Maryland Extension
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Research-based source imported with the national garden problem starter library.
website
Slugs and snails guidance — University of Minnesota Extension
University of Minnesota Extension
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Research-based source imported with the national garden problem starter library.
website
Spotted cucumber beetle guidance — University of Minnesota Extension
University of Minnesota Extension
Visit Source
Research-based source imported with the national garden problem starter library.
website
Spotted wing drosophila guidance — USDA NIFA / SWD IPM
USDA NIFA / SWD IPM
Visit Source
Research-based source imported with the national garden problem starter library.
website
Squash bug guidance — University of Minnesota Extension
University of Minnesota Extension
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Research-based source imported with the national garden problem starter library.
website
Squash vine borer guidance — University of Minnesota Extension
University of Minnesota Extension
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Research-based source imported with the national garden problem starter library.
website
The Old Farmer’s Almanac — Gardening and Planting Guides
The Old Farmer’s Almanac
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Established secondary gardening reference offering ZIP-code-based planting calendars, local frost-date estimates, vegetable and herb growing guides, seed-starting and transplant schedules, seasonal gardening advice, and general crop-care information. Its planting calendar recommends dates based on the user’s location and local frost dates. Use as a supporting reference for planting-window comparison and general cultivation guidance; prioritize current Cooperative Extension recommendations and Edaphia’s normalized regional records when local guidance differs.
website
The Spruce: Best Companion Plants for Pole Beans
The Spruce is part of the People Inc. publishing family
Visit Source
website
The Ultimate Homestead
The Ultimate Homestead
Visit Source
website
Thrips guidance — University of Maryland Extension
University of Maryland Extension
Visit Source
Research-based source imported with the national garden problem starter library.
website
Title: Vegetable Planting Calendar
University of Missouri Extension
Visit Source
website
Tomato and tobacco hornworms guidance — University of Minnesota Extension
University of Minnesota Extension
Visit Source
Research-based source imported with the national garden problem starter library.
website
Tomato spotted wilt guidance — University of Maryland Extension
University of Maryland Extension
Visit Source
Research-based source imported with the national garden problem starter library.
website
Two-spotted spider mite guidance — University of Minnesota Extension
University of Minnesota Extension
Visit Source
Research-based source imported with the national garden problem starter library.
spreadsheet
United States ZIP Codes Database
SimpleMaps
Visit Source
Nationwide ZIP-code dataset used to enrich Edaphia USDA ZIP records with city, state code, and state name. Imported fields include zip, city, state_id, and state_name. The import does not replace USDA hardiness-zone data or Edaphia planting-region assignments.
The free database requires a visible public backlink to the SimpleMaps US ZIP Codes Database page.
other
USDA PLANTS Database
USDA Natural Resources Conservation Service
Visit Source
Authoritative federal plant database providing standardized scientific and common names, taxonomic classifications, plant symbols, native and introduced status, geographic distribution, plant characteristics, crop information, images, references, and species-specific fact sheets and plant guides. Useful for verifying crop identities, scientific names, aliases, plant families, growth habits, native status, and U.S. distribution. The database covers vascular plants, mosses, liverworts, hornworts, and lichens found in the United States and its territories. It is not primarily a vegetable planting-calendar source, so planting dates and regional cultivation recommendations should be obtained from Cooperative Extension or other climate-specific references.
pdf
Vegetable Garden Calendar
University of Georgia Cooperative Extension
Visit Source
Month-by-month vegetable gardening calendar for Georgia. Published dates are centered on middle Georgia, with instructions to move spring dates two to three weeks earlier and fall dates up to two weeks later in extreme south Georgia. Useful for supporting crop and seasonal suitability across warm-temperate USDA Zones 7 through 9.
website
Vegetable leafminers guidance — University of Minnesota Extension
University of Minnesota Extension
Visit Source
Research-based source imported with the national garden problem starter library.
website
Verticillium wilt guidance — University of Minnesota Extension
University of Minnesota Extension
Visit Source
Research-based source imported with the national garden problem starter library.
website
Voles guidance — University of Maryland Extension
University of Maryland Extension
Visit Source
Research-based source imported with the national garden problem starter library.
website
White mold / Sclerotinia rot guidance — University of Minnesota Extension
University of Minnesota Extension
Visit Source
Research-based source imported with the national garden problem starter library.
website
White-tailed deer guidance — USDA APHIS Wildlife Services
USDA APHIS Wildlife Services
Visit Source
Research-based source imported with the national garden problem starter library.
website
Whiteflies guidance — USDA NRCS
USDA NRCS
Visit Source
Research-based source imported with the national garden problem starter library.
website
Wireworms guidance — University of Maryland Extension
University of Maryland Extension
Visit Source
Research-based source imported with the national garden problem starter library.
