# when.garden

> Global, location-specific planting calendars. Enter any town on Earth and get its frost dates, growing-season length, Köppen climate zone, and per-crop sow / transplant / harvest windows. Built from public climate data, with a source label and confidence score on every figure.

when.garden answers one question well: *when should I plant, here?* It is not US-ZIP-locked — it covers frost regions and the tropics worldwide, using whichever method fits a place: frost dates (temperate), wet/dry seasons (tropics), observed national calendars, or climate modelling everywhere else.

## Main sections

- [Home & location search](https://when.garden/): find your town.
- [Crops index](https://when.garden/crops): every crop, and when to plant it.
- [Climate zones](https://when.garden/climate): the Köppen zones in the dataset.
- [Location page](https://when.garden/au/melbourne): frost dates + full crop calendar for a place.
- [Location × crop](https://when.garden/au/melbourne/tomato): exact dates for one crop in one place.
- [Crop hub](https://when.garden/plant/tomato): a single crop across locations.
- [Climate zone](https://when.garden/climate/Cfb): Köppen zone explainer + member locations.
- [Frost dates](https://when.garden/frost-dates/au/melbourne): frost-only intent page.
- [About](https://when.garden/about): what it is and how it works.
- [Data & methodology](https://when.garden/data): sources, licenses, and how figures are derived.

## For developers

- [API docs (Swagger UI)](https://when.garden/api/docs)
- [OpenAPI spec](https://when.garden/api/openapi.json)

## Attribution

Climate data: NOAA GHCN-Daily (public domain); NASA POWER; Köppen-Geiger © Beck et al. 2023 (CC BY 4.0); crop requirements: FAO ECOCROP (CC BY 4.0); observed calendars: FAO GIEWS & national bulletins; geocoding © OpenStreetMap contributors.