TurfStar Carbo-load 10-10-20 is second to none. It's like a lullaby for your lawn. This blend has it all -- Everything your grass and soil need for a healthy and restful winter. Packed with high-quality, readily-available magnesium and potassium, this formula will replenish minerals leached from soil, balance pH and send much-needed carbohydrates deep into the roots to prepare for dormancy and helps keep disease and fungus at bay!