(I've been following the 'lime' thread on here, and I thought it was only fair to balance it all out with a little talk about lowering pH.) For the past year I've been experimenting with two sections of fescue turf locally, that both have had test results (from CLC Labs) with pH levels showing 7.7 and 8.1 respectively, at the beginning of the growing season 2007. The 7.7 site has pretty decent, loose soil in general. Probably never disturbed. The 8.1 site is very heavy clay, soil disturbed and definately turned over from excavation and home building operations. On (just) one third of BOTH sections, I've applied split-pea sulfur at the typical rate of 50# / 1000. I did this three times at different points last year. On the "opposite" thirds, I applied 7% white vinegar to the turf at a dillution rate of 1 oz / gallon, and a spray rate of 4 gallons per 1000 sq.ft. I also did THIS 3X last year. And in the "middle" of both sections; I did nothing. This is the 'control' turf in the experiment. Right now, I'm about ready to send six new samples back up to Chuck Darrah at CLC to see how this somewhat-crude experiment turned out. Depending upon the results...it may continue into 2008. ________________ But... Who else out there has used vinegar to lower pH in turf ? What are your experiences with tank mix compatibility ? I know about it's (somewhat more concentrated) uses in weed control...but I've also come to understand over time that traditional pesticide performace, both insect and weed controls, can be enhanced to a certain degree when applied in a water pH solution that ranges from 5.5 to 6.5. The ultimate idea of all this...is to possibly include 'minute' amounts of vinegar in most or all of my sprays where the soil has been proven to be alkaline, (which, around here, is just about everywhere! ) Because I do almost all liquid fert already, it seems a natural marriage.