Plant Data Sources
Plant spacing, depth, germination, maturity, and cultural data in this application has been compiled from and cross-referenced against the following authoritative sources:
- USDA Cooperative Extension System — University extension publications from Cornell, Clemson, University of Minnesota, and University of Tennessee (UT Extension), which conduct localized research and publish peer-reviewed growing guides based on USDA hardiness zones.
- Knott's Handbook for Vegetable Growers, 5th Edition (Maynard & Hochmuth, 2007) — The standard professional reference for vegetable production data including spacing, planting depth, germination requirements, and days to maturity.
- ATTRA / National Center for Appropriate Technology — Federally funded resource for sustainable and organic growing practices, companion planting, and integrated pest management.
- USDA Plants Database (plants.usda.gov) — Federal authority on plant classification, hardiness zones, and native range data.
Companion Planting
Companion and antagonist relationships are based on data from university extension trials and Carrots Love Tomatoes by Louise Riotte, the most widely cited companion planting reference.
Pest & Disease Information
Pest identification and organic treatment recommendations are sourced from the Organic Gardener's Handbook of Natural Pest and Disease Control (Rodale Press) and ATTRA pest management guides. These are suggestions only — see disclaimer on each treatment card.
Weather Data
Weather forecasts and alerts provided by the National Weather Service (NWS) API (api.weather.gov), a service of the National Oceanic and Atmospheric Administration (NOAA).
Geocoding
Address lookup powered by OpenStreetMap Nominatim, used under the Open Database License (ODbL).
Data has been adapted for home garden use. Always consult your local cooperative extension service for region-specific recommendations.