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Asked by carl ·August 15, 2019 ·19.2k readers

Water use per sq ft

Hey I had heard to use 100 gallons/acre for soil drench and 25 gal/acre for foliar.  At our current bed setup of 1440 sq ft thats only 3 gal for soil drench and 0.75 gal for foliar which seems like way too low a number to effectively reach everything.  Has anyone had any experience on this or has a recommendation on water usage to mix inputs with per acre/sq ft?

inputs water

The answer

From the KNF library

From the KNF library Drafted by Claude from Office Hours and the books · Sep 2026 · 6 sources

The library confirms the rates you heard. Master Cho recommends 25 gallons per acre when spraying and 100 gallons per acre when drenching through the roots. (Office Hours Ep. 125, 20:43)

Drake keeps the dilution the same and changes only the volume. A drench takes 100 gallons per acre against 25 for foliar. (Office Hours Ep. 9, 47:33)

The library scales those rates down by area. A quarter acre takes roughly 6 to 6.5 gallons foliar, or about 25 gallons for a soil drench. (Office Hours Ep. 37, 17:21) One source has structure sprays misted at 25 gallons per acre every 7 to 11 days. (Office Hours Ep. 142, 37:50)

Drench volumes vary by input:

The library does not say whether 3 gallons wets a 1,440 sq ft bed evenly.

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