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Grittyville, WA

Ammonium sulfate would make sense? Zinc sulfate, copper sulfate? I guess the huge quantity of calcium is binding most of the sulfer you are adding. I dont know how sulfer gets unlocked, except perhaps the soil biology. I also haven't read or seen anything on foliar feeding sulfer. Other than foliar feeding, my guess is the soil biology is somehow going to play a role in the plants getting more sulfer. Best wishes!

6/26/2025 12:53:59 AM

Grittyville, WA

Update: Some research suggests that elemental sulfer is better fertilizer than sulfate, even though plants use sulfate, the biological transformation of sulfer into sulfate is very healthy for soil & plants:

https://www.sciencedaily.com/releases/2013/04/130417185531.htm

https://pmc.ncbi.nlm.nih.gov/articles/PMC6630323/

[Last edit: 06/26/25 6:15:52 AM]

6/26/2025 5:59:01 AM

Stilwell, KS

Great idea on the Zinc and Copper sulfate. I think you’re onto something with the calcium binding up the sulfur. Looking forward to reading the articles this weekend. Because of my high PH, I use a lot of elemental Sulfur, I add about 200lbs each year to the patch(5,000 sqft). FWIW Relatively cheap amendment at $20 for 50lbs

6/27/2025 6:56:44 AM