A species must reach maturity within the site's frost-free window.
Well established · fatal if ignored → block
How it works
Accumulated GDD vs gdd_to_maturity, or DTM vs frost-free days.
What to do about it
Transplant, choose a shorter-DTM cultivar, or refuse the species for this site.
The evidence
Evidence: settled without a trial - GDD models.
Cite this page
Milpa Gardens. "A species must reach maturity within the site's frost-free window." Evidence grade: Well established. https://milpa.garden/rules/species-reach-maturity-within-site-s-frost/
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.