# Greenplot

> Plan your garden to scale, sow on time, log every harvest and share the plot. Greenplot plans and runs a garden: draw the plot to scale with beds, paths, trees, a greenhouse, compost and water, see where the sun falls over the season, and fill beds square by square or in rows with dated plantings and repeat sowings. Sowing, planting, pruning and harvest dates come from your frost dates for 122 vegetables, herbs, fruit and flowers; tasks, weather warnings, the harvest log, costs, seeds and a photo journal keep the season on track. Gardens stay in your browser, or are shared in a workspace with your allotment group or family.

Greenplot (Garden planner & manager) is an app of usefulweb.app (https://usefulweb.app/): a full program that runs in the browser. Its engine is deterministic and the same functions are exposed as tools, so an agent can compute exactly what the app shows.

## Use it
- Landing page: https://greenplot.usefulweb.app/
- Workspace (browser app): https://greenplot.usefulweb.app/app - open a project with https://greenplot.usefulweb.app/app#project=<base64url-encoded project JSON> or a template with https://greenplot.usefulweb.app/app#template=<id>
- Project file format (JSON Schema): https://greenplot.usefulweb.app/project.schema.json
- Tutorials: https://greenplot.usefulweb.app/tutorials
- JSON API: POST https://greenplot.usefulweb.app/api/v1/tools/<toolId>/calculate (catalog: https://greenplot.usefulweb.app/api/v1/tools)
- OpenAPI: https://greenplot.usefulweb.app/openapi.json
- MCP (Streamable HTTP): https://greenplot.usefulweb.app/mcp

## Engine tools
- [Garden Sowing Calendar (122 Plants)](https://greenplotsowingcalendar.usefulweb.app/): Sowing, planting, harvest and pruning dates for 122 garden plants from your frost dates. Part of [Greenplot](https://greenplot.usefulweb.app/) (ownerApp: greenplot). API: POST https://greenplot.usefulweb.app/api/v1/tools/greenplot-sowing-calendar/calculate · MCP tool `greenplot_sowing_calendar`
- [Succession Sowing Planner](https://greenplotsuccessionplanner.usefulweb.app/): Space repeat sowings of lettuce, radish, beans and more so you harvest all season. Part of [Greenplot](https://greenplot.usefulweb.app/) (ownerApp: greenplot). API: POST https://greenplot.usefulweb.app/api/v1/tools/greenplot-succession-planner/calculate · MCP tool `greenplot_succession_planner`
- [Companion Planting Checker](https://greenplotcompanioncheck.usefulweb.app/): Check which of your plants go well together, which to keep apart, and why. Part of [Greenplot](https://greenplot.usefulweb.app/) (ownerApp: greenplot). API: POST https://greenplot.usefulweb.app/api/v1/tools/greenplot-companion-check/calculate · MCP tool `greenplot_companion_check`
- [Garden Weather Tasks](https://greenplotweathertasks.usefulweb.app/): Frost warnings, watering you can skip after rain, and litres per bed from the MET Norway forecast. Part of [Greenplot](https://greenplot.usefulweb.app/) (ownerApp: greenplot). API: POST https://greenplot.usefulweb.app/api/v1/tools/greenplot-weather-tasks/calculate · MCP tool `greenplot_weather_tasks`
- [Frost Dates Finder](https://hearthfrostdates.usefulweb.app/): Last spring and first autumn frost at your place, with the chance of a later or earlier frost. Part of [Hearth](https://hearth.usefulweb.app/) (ownerApp: hearth). API: POST https://greenplot.usefulweb.app/api/v1/tools/hearth-frost-dates/calculate · MCP tool `hearth_frost_dates`

## Formats
- Import: Greenplot garden (.greenplot.json), Garden link (#project=), Photos (JPEG, PNG, WebP) for the journal
- Export: Greenplot garden (.greenplot.json), Garden plan and checklist (PDF), Garden plan (SVG), Calendar (.ics), Harvests, costs, seeds and work time (CSV), Garden link (#project=)

## Limits
- Sun hours are geometric (clear sky); clouds, reflections and the slope of the ground are not included, and objects are boxes or circles without rotation.
- Frost dates are looked up for Germany and the United States only; elsewhere you enter your own.
- Timings, spacing and companion pairs are rules of thumb for temperate gardens, not advice for a particular variety or climate.
- Yields are what you log; Greenplot does not predict them.
- Photos are reduced to at most 1280 pixels and six per journal entry so gardens stay small; very large gardens with many photos may not fit in a workspace document.
- Weather advice needs a place and an internet connection; it covers the next nine days at most.