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