You must rotate every crop to new ground every single year.
Contested
You don't have to rotate everything every year — intervals are family- and pathogen-specific. This corpus keeps the ones with real mechanisms (tomatoes ~3 yr, cucurbits 2-3, brassicas 4-7); a yearly shuffle of a low-pressure crop buys nothing, and perennials must never be rotated.
What is actually known
Rotation intervals are pathogen- and family-specific, not a blanket yearly rule. This corpus encodes the ones with named mechanisms: nightshades ~3 years, cucurbits 2-3, brassicas 4-7, with an allium/carrot family break that needs its own rotation. A yearly shuffle of a crop under no soilborne pressure buys nothing, and perennials must not be rotated at all — tillage destroys the crown. Rotate against the specific pathogen, on its interval.
Evidence: not yet confirmed against its 1 source.
what this rests on - one pointer
rotation intervals are family- and pathogen-specific; see other rules here
When would that grow at your place? →
Cite this page
Milpa Gardens. "You must rotate every crop to new ground every single year." Evidence grade: Contested. https://milpa.garden/beliefs/rotate-year-crop-rotation-yearly/
A garden-planning corpus: every claim states its evidence grade and links its sources on the page. Cite it with the grade, and add the date you read it.