Lawn Care Forum banner

Soil Ph in south Florida St Augustine grass

7.4K views 4 replies 4 participants last post by  Midget  
#1 ·
I tried searching this forum using keywords "Ph", then "soil Ph", and so forth but the terms are too vague for the search engine so hopefully someone sees this post. I live in Miami and everyone's St Aug grass got hit hard around here by fungus because of some really weird weather patterns over the last two months. Cold to hot, humid to arid, dry to wet, all over the place. My lush St Aug got hammered with brown patch and possibly some TARR. I had a paid service doing my chems but he didnt catch it and probably hurt it. I spent almost $500 over two months with varying classes of fungicides to treat. I have it under control but while researching fungus, I found that highly alkaline soil can contribute so I decided to send some soil samples to Univ of FL. It came back saying my soil was very alkaline. Average 8.0 and they suggested it to be 6.5. On a logarithmic scale, thats a crap ton. I grew up in Miami and never heard of anyone trying to amend their soil for acidity.

I've read that I can apply sulfur or sphagnum peat moss to lower Ph. The peat moss also helps with the TARR. Is this really necessary in south FL? I have no idea how my soil Ph got so high. St Aug down here grows pretty much year round and does not go dormant. Any ideas? Thanks.
 
#2 ·
Having fought TARR and brown patch and grey leaf spot this past year in SWFL, I feel your pain. I tried a bale of peat moss early last summer on about 2500 sq. Ft. backyard then learned it should be one bale per 1000 sq. Ft so I added 3 more bales to backyard and 3 to 2500 sq. Ft. front yard. I will find out if it helped my ph when I get my soil tested this year. Like you I have spent a small fortune on various chemicals but I think I will start rotating between Armada ,Clearys 3336F, Azoxy, and Pillar G this year. My problem is starting to clear up so those appear to be working. I also just got some Eagle to throw into the rotation for the upcoming year. I know the weather conditions won't change in SWFL so I'm gonna be proactive this year. I've learned a ton on this site to help me! Good luck in your similar battle!