Johnny's Selected Seeds catalog
Commercial grower catalog; consensus reference for maturity days and resistance codes of modern hybrids. Code convention, checked 2026-10-07: Johnny's reference chart glosses F only as Fusarium Wilt and defines no FF or FFF, so its codes carry no races by themselves. Its product pages do name races per variety ("Fusarium Wilt races 1, 2 (High)"), and those statements, read from 22 current pages, are what AMSeed records as race-specific claims, each linked to its page. Checked against those pages, the letter-count reading of the codes was wrong for 4 of 16 tomatoes, two of them in the overstating direction.
This record cites the publisher's output as a whole rather than one publication, and 59 of its 123 resistance claims say where inside it the statement appears. Following a citation to it lands on a homepage. That is a gap in our records, counted on the source index and being worked down.
Resistance claims
What this source says about each variety. Alone marks a claim no other source in the database corroborates, so it stands or falls with this one.
Every source, by what rests on it · How AMSeed handles evidence