A basil dropped back into ground where a basil crop wilted and died young tends to do the same - growing normally to a hand's height, then stunting and suddenly collapsing - because Fusarium wilt leaves that ground infective for years, not for a season.
A good hunch · suboptimal if ignored → advise
How it works
Fusarium oxysporum f. sp. basilici is a soilborne fungus specific to basil (not the tomato or watermelon Fusarium); once a planting is infested its resting spores persist in the soil for eight to twelve years. It usually arrives on contaminated seed rather than lying in wait everywhere, so it is a hazard only where infected seed has been sown - but where it is, plants of the mint family carry it without showing symptoms and can hold the ground infective from one year to the next.
What to do about it
Start from seed tested clean for the fusarium fungus, or hot-water-treat your own (twenty minutes at 133-136 F); where the disease has appeared, grow a resistant variety where one is offered and keep basil - and any standing mint - off that ground for several years. A wait alone is only partial cover, since the spores last the better part of a decade and mints can carry them.
The evidence
Evidence: confirmed against 1 source in the research-based literature.
the source
NC State Extension, Growing Small Farms, 'Fusarium Wilt of Basil', growingsmallfarms.ces.ncsu.edu/growingsmallfarms-fusariumbasil (fetched in-container 2026-09-03; read by the maintainer 2026-09-03): 'Once a field has become infested with the fusarium wilt pathogen, infective propagules may persist in the soil for 8-12 years. During that time, growers should avoid growing sweet basil or members of the mint family'; 'The disease is introduced into fields, hydroponic systems, and greenhouse culture primarily through contaminated seed'; 'If it is not possible to obtain tested seed, the seed should be soaked in cold water for four hours followed by a heat treatment of 20 minutes in 133-136 F water'; 'Mints will not exhibit symptoms of the disease but may carry over the inoculum from year to year'; 'Some seed companies also sell resistant varieties.' [read]
Plants this fires on
Change history
Every change to this rule is one commit. This is what the project's version history records — the date and the reason — not a summary of it.
- corpus: another rule here basil Fusarium wilt replant advisory, verified (O135 #6)
Cite this page
Milpa Gardens. "A basil dropped back into ground where a basil crop wilted and died young tends to do the same - growing normally to a hand's height, then stunting and suddenly collapsing - because Fusarium wilt leaves that ground infective for years, not for a season." Evidence grade: A good hunch. https://milpa.garden/rules/basil-dropped-back-into-ground-where-basil/
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.