I have just put in several new, very large patches of St. Augustine Bitter Blue all over the yard and needed to water it every day for a month, then every other day. That's tough and risky to do considering I also had to water the existing/established grass, which doesn't like so much water, and had some fungus from late Winter hanging around. This stuff killed/prevented all the fungus and other diseases, and as all grass, including the new sod "popped" for Spring, the blades are out green and pure on my whole yard. I have always used fungus treatments only to cure problems, but seeing what this did for new sod (protecting it) and my existing wet lawn, I intend to use it the full four times over the year, preventative as well as curative, especially late June and early September when fungus is real problem again. I got the gallon size, and sure seems expensive, but it will be enough to last into next year. Considering the hose-end products you buy in home stores is expensive, this will save about 50%, plus it's the good stuff. I used a hose end sprayer, and it goes on quickly and accurately. Kind of a strong smell, but not noxious.