My lawn is significantly lack of potash according to soil test result
from local county extension office. But the soil also has too much
phosphate. I am looking for a way to add potash without raising
phosphate level in my soil, and do this cheaply. I cannot use regular
fertilizer that tends to always have not so small amount of phosphate.
I have a message thread about this called "How to Add Enough Potash to
Lawn in a Year?" not so long ago.

I find that there is a moss control product in Home Depot that has a
large amount of potash, and has no phosphate. This sounds great. But I
am wondering if it may hurt my lawn; afterall, I don't have moss
problem in my lawn.

Thanks in advance for any info.

Jay Chan