The main purpose of winterizer applications is to prevent blades of grass from cracking or drying out in cold temperatures.
The potassium in winter applications helps make grasses more tolerant of extreme temperatures and also optimizes the grass’s use of nitrogen. Nitrogen is important for color and the metabolic processes of plants and a lack of potassium in plants can cause discoloration due to dead leaf tissue.
Potassium is responsible for the plant’s use of water which is crucial for color and overall health and good potassium levels promote green sturdy stems and deep roots which are more resistant to cold temperatures. The effects of high potassium winterizing fertilizers will help lawns endure the winter and look green and healthy the following spring.