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Grittyville, WA

https://youtu.be/Ua3xdcoKJ4I?t=612

Matt Debacco mentioned at 5:45... I had no clue he did a thesis on this. Not sure if he uses milk in his patch?

6/3/2026 7:11:35 PM

Grittyville, WA

I the video is partly if not mostly AI so double check the facts but its worth a try. Dirt don't hurt and sour milk don't hurt... Probably prohibitively expensive for general agriculture. (But its cheap if it keeps you from getting a chronic illness.)

6/3/2026 7:22:17 PM

Torrance, Ca.

I have a friend that grows well down here that has used milk for pm for years and it works for him.

It won't work in my greenhouse setup.

6/10/2026 9:25:01 AM

Grittyville, WA

SoCal, try using it in the morning as the sun hits the plant. Its a combo of ultraviolet light plus the milk. Oh but yeah greenhouse plastic reduces the needed UV light.

And I'd have to watch the video again but I think maybe its supposed to be sour milk, at a 1:10 milk:water ratio. They also mention the fat portion of the milk is important so you'd want to use whole milk I guess? It might not have to be sour it seems very inconvenient to have to deal with curdles when spraying. Maybe I missed that part of the video... Thats what I remember from the video granted my memory can't be fully trusted.

I'm no expert, but my tomatoes have survived a few rounds of sour milk, and so have I. I guess its not hurting them or myself!

[Last edit: 06/10/26 1:19:44 PM]

6/10/2026 1:15:54 PM

Upa Creek, MO

Milk used to be thrown around here quite a bit and works to some extent. Organocide works for me or at least delays it until Fall for AGs. Field pumpkins are much more prone, and I need a systemic as no organic method works.

6/10/2026 5:30:33 PM