Low pH can cause moss, bare spots and weeds to grow in your grass. Lime helps balance soil pH and creates a better soil environment for your lawn, which significantly reduces these problems. Pennington® Fast Acting Lime goes to work the instant it touches water, so you’re sure to see fast results. Unlike traditional pelletized and pulverized lime that could take up to six months to work into the soil. One bag of Fast Acting Lime is equal to 5 bags of traditional lime. Faster activating time and faster applying time.