Your pH is fine, no need to add sulfur.

The fertilizer recommendation of 2.98 lb of nitrogen, .11 lb of phosphate, 1.38 lb of potash per 1000 sq ft is for the year. Here are soil remediation guidelines:
https://thelawnforum.com/viewtopic.php?t=15165

Here is some guidelines in zoysia from Arkansas:
https://www.uaex.uada.edu/publications/pdf/FSA-6122.pdf
I just skimmed through but it was saying limit nitrogen to 2 lb a year. You might do some more research on the proper amount for zoysia. Clemson has a different take:
https://hgic.clemson.edu/factsheet/zoysiagrass-maintenance-calendar/

 

Hi @Virginiagal - why do you think no Sulfur is necessary? Just asking - I can't argue otherwise! It wasn't tested for it appears so we have no idea what's there.

I know that farmers need to be adding sulfur - it's a common deficiency (that I most often see in winter wheat crops). The reason it's become a problem in the last 20 years is because we've eliminated acid rain. Farmers had gotten used to high/sufficient S levels and once acid rain was reduced, they weren't getting the benefit of that sulfur added during rain events.

So I was thinking that Sulfur could be necessary but I don't know.

 

They are recommending sulfur (their product of soil acidifier) to bring the pH down, probably to 6.5, which is a common target pH. But at 6.9 pH, that is in the good zone for pH. So it's unnecessary.

 

my zoysia is growing great and my pH is 7.6 per TAMU...though I am curious what it might be like if I were able to lower it

 

@Powerlock25 Here are soil remediation guidelines which has some info on using sulfur to lower pH:
https://thelawnforum.com/viewtopic.php?t=15165