Getting the nitrogen and potassium right is important for cold hardiness and stronger, longer root systems
The best type of lawn fertilizer to use in the fall is one with a high ratio of potassium (K) and a moderate amount of nitrogen (N). These fertilizers are often labeled as "fall" or "winterizer" formulas.
Potassium strengthens the grass's root system and enhances its resistance to cold and stress, preparing it to survive the winter months.
Nitrogen promotes a final burst of growth, helping the grass green up and store energy for the next growing season. A typical N-P-K ratio for fall fertilizers is 10-0-20 or 12-4-24, where the potassium content is higher than the nitrogen.
Timing is crucial when applying fall fertilizer, usually between mid-September and early October where we live. Apply the fertilizer after the lawn's active growing season has slowed, but before the ground freezes.
Slow-release fertilizers are ideal for fall because they provide nutrients gradually over the winter, promoting steady root growth. Also look for fertilizers that contain organic matter or micronutrients, as these will improve soil structure and increase the lawn's resilience through winter.
Potassium strengthens the grass's root system and enhances its resistance to cold and stress, preparing it to survive the winter months.
Nitrogen promotes a final burst of growth, helping the grass green up and store energy for the next growing season. A typical N-P-K ratio for fall fertilizers is 10-0-20 or 12-4-24, where the potassium content is higher than the nitrogen.
Timing is crucial when applying fall fertilizer, usually between mid-September and early October where we live. Apply the fertilizer after the lawn's active growing season has slowed, but before the ground freezes.
Slow-release fertilizers are ideal for fall because they provide nutrients gradually over the winter, promoting steady root growth. Also look for fertilizers that contain organic matter or micronutrients, as these will improve soil structure and increase the lawn's resilience through winter.