What does “winterizer” fertilizer do?
Many lawn fertilization programs include a final application of “winterizer.” These fertilizers contain a higher amount of potassium than most lawn fertilizer. An example of that ratio is: 10-10-20. Higher potassium levels will improve winter hardiness in lawn grass. Potassium has a high salt index creating a ‘burn’ potential in some instances, so read and follow label instructions. If you are also applying lime in the Fall, it is best to separate your winterizer and lime applications by at least 2 weeks.
