The optimal timing for application of a winter lawn fertilizer centers around preparing the grass for dormancy and ensuring its health through the harsh winter months. This type of fertilizer is generally applied in late fall, typically after the last mowing of the season but before the ground freezes.
This late-season fertilization approach strengthens the root system, allowing the grass to store essential nutrients for the winter. This enhanced root development promotes earlier green-up and improved vigor in the following spring. Historically, this practice has been recognized as a key component of proactive lawn care, leading to healthier and more resilient turf.