Downloaded you calculator App - need dilution ratio after making the solutions
Hi,
I have downloaded you calculator app for the solutions.
I want to know the dilution ration of the solution at the time of foliar spraying the solutions.
Regards,
Kanchi
Top answer
That is exactly what the app does for you, type in how much you want to make, and it tells you how much of each solution to add. Simple division will give you the ratios.
OHN and FAA are 1000:1
Most others are 500:1
From the KNF library
From the KNF library
Drafted by Claude from Office Hours and the books
·
Sep 2026
·
7 sources
The library adds a few solution-specific ratios to Leo's rule of thumb.
- OHN is mixed at 1:1000. Drake's manual uses 1:1500 if plants are stressed or the OHN is older than 6 months. (Student's Manual, Basic Course, p. 27)
- LAB is also 1:1000, so not every solution sits at 500:1. (Student's Manual, Basic Course, p. 18)
- The university FPJ sheet in the manual gives a 1:500 preparation table. (Student's Manual, Basic Course, p. 35)
- Protectors use a standard 1:1000. For active blight, Drake says bump it to around 1:700 or even 1:500. (Office Hours Ep. 129, 41:09)
In drought, Drake says you can't go wrong diluting more. (Office Hours Ep. 79, 37:55)
Sources differ on ratios. Drake says even Master Cho's own literature changed over time and in translation, so treat ratios as guidelines. (Office Hours Ep. 74, 21:17) Another answer says the Android app matches Master Cho's numbers exactly. (Office Hours Ep. 67, 38:09)
The library does not give a full chart of foliar ratios for all nine solutions.
Sources
- 37:55 Office Hours Ep. 79 (Jun 2023) — Seawater Dilution Ratios, Restaurant Waste for Pigs, Powdery Mildew · “You can't go wrong diluting more”
- 21:17 Office Hours Ep. 74 (May 2023) — Bacterial Wilt on Kale, Gator Sprayer Setup, IMO Ammonia Fix · “Even Master Cho's own literature changed over time and in translation, so treat the ratios and formulas as guidelines, not fixed law.”
- 38:09 Office Hours Ep. 67 (Mar 2023) — Mosaic Virus, Banana Bunchy Top, and Making Lactic Acid Bacteria · “matches Master Cho's numbers exactly”
- 41:09 Office Hours Ep. 129 (Jun 2024) — Tomato Blight Protectors, IMO Baths, Jadam Microbe Solution · “Bump the standard 1:1000 up to around 1:700 or even 1:500, applied as part of the full leaf formula.”
- p. 27 Student's Manual, Basic Course · “OHN is mixed with water at a ratio of 1:1000. It is mixed with water at a ratio of 1:1500 if the plants are stressed OR your OHN is older than 6 months”
- p. 35 Student's Manual, Basic Course · “Table 2a. Preparation of 1:500 FPJ Solution Amount of FPJ (select ONE column only) for 1:500 dilution”
- p. 18 Student's Manual, Basic Course · “LAB is mixed with water at a ratio of 1:1000.”
