Join Date: Apr 2007
Location: HI, but Pueblo, CO for now
The thing about k2so4 is that it isn't very soluble. You can make a make a solution but it may be a bit dilute. k2so4 is easiest dosed dry. Remember also, you are getting potassium from kno3 and kh2po4. So, you need to factor those sources for hittin a target ppm. The thing about ferts, you don't have to be exact. Close is good enough. As far as I know, there isn't anything bad with overdosing k unless you get to the 100ppm or so range. But, that will be very hard to do unless you want to.