Blossom end rot
Hello! Having blossom end rot issues on our squash and was wondering if there was a specific KNF approach to dealing with it. Thanks!
The answer
Well Blossom End Rot is caused from a lack of Calcium so WCA and WsCaPhos would both work.
From the KNF library
From the KNF library
Drafted by Claude from Office Hours and the books
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Sep 2026
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2 sources
The library adds one step to the calcium sprays already named.
Asked about blossom end rot on watermelons, Drake answered with KNF reproduction at 1:1000. He paired it with minerals at 1:25, either sea salt or seawater, alongside the regular maintenance lineup. (Office Hours Ep. 132, 44:35)
Cho writes that the stages of a crop cycle, from flower blossom through ripening, do not require the same physiological conditions. (Cho, Theory, p. 91)
The library does not mention squash by name. It also does not say why the mineral step helps or how often to apply it.
Sources
- 44:35 Office Hours Ep. 132 (Jul 2024) — Chicken Egg Lay Rates, Well Water E. Coli, Blossom End Rot Calcium · “Use KNF reproduction at 1:1000 with minerals (sea salt or seawater) at 1:25 alongside the regular maintenance lineup.”
- p. 91 Cho, Theory · “ripening, coloring, maturing, and sleeping do not require the same physiological conditions.”
1 more answer
KNF Foliar Chart suggests 4 tsp/gal WsCaPhos during fruit puberty and 4 tsp/gal WCA during Fruit Maturity.
