Explainers

The reasoning behind the planner, written out: what it refuses to tell you and why, which geographic number does which job, and where the data model came from.

• Why this planner will never give you a companion-planting chart The grid of good and bad neighbours is the most reproduced object in garden writing and one of the least examined. Here is what happens when you check it.
• Your hardiness zone does not know your frost date Zone, frost dates and latitude are three different numbers that answer three different questions. Nearly every garden tool uses the first for all three.
• Rotation belongs to the ground, not to the bed Most garden apps attach crop history to a bed. Rearrange the beds and the history is gone. Here is why this one attaches it to the soil instead, and what that buys you.
• What a milpa is, and why Three Sisters is only part of it The best-known polyculture in North American gardening is the northern expression of a much older field system. The difference matters, and it is mostly a question of scale.
• How this is built - a rules corpus in git, and an app that is only its front end The product is a versioned YAML corpus with evidence grades, a Python engine, and a TypeScript port checked against it. The web app is a thin layer over the top and is the least interesting part.