About

Plants by Numbers turns public data — the USDA's 2023 Plant Hardiness Zone Map, NOAA's 1991–2020 Climate Normals, and university extension planting tables — into planting calendars for every US zone. No accounts, no tracking beyond a self-hosted page counter, no sold listings.

"Your zone is your number" is the whole idea: one number decides your frost dates, and frost dates decide almost everything else in the vegetable garden.