Late-fall fertilizer application for cool-season grasses is best timed to occur which of the following?

Late-fall fertilizer application for cool-season grasses is best timed to occur which of the following?

• A. It should be applied just after the last mowing
• B. It should be applied before the last mowing
• C. It should be applied in mid-summer
• D. It should be applied in early spring

Answer: (A)

In cool-season grasses, the aim of a late-fall fertilizer is to give the plant a final, modest nitrogen boost as growth slows and the lawn starts to store energy for winter and quick spring green-up. Applying after the last mowing is best because the nutrients stay on the leaf blades long enough to be absorbed and are less likely to be removed by another mowing. This timing also supports building carbohydrate reserves in the roots and crowns, which helps the turf survive winter and rebound quickly in spring. If you fertilize before the last mowing, you risk losing some of the fertilizer to the mower and encouraging additional top growth that may be vulnerable to cold. Mid-summer fertilization can stress hot, dry conditions, and early-spring applications can promote a growth flush that isn’t yet protected by adequate hardening. So the most effective timing is right after the final mowing in late fall.

In cool-season grasses, the aim of a late-fall fertilizer is to give the plant a final, modest nitrogen boost as growth slows and the lawn starts to store energy for winter and quick spring green-up. Applying after the last mowing is best because the nutrients stay on the leaf blades long enough to be absorbed and are less likely to be removed by another mowing. This timing also supports building carbohydrate reserves in the roots and crowns, which helps the turf survive winter and rebound quickly in spring. If you fertilize before the last mowing, you risk losing some of the fertilizer to the mower and encouraging additional top growth that may be vulnerable to cold. Mid-summer fertilization can stress hot, dry conditions, and early-spring applications can promote a growth flush that isn’t yet protected by adequate hardening. So the most effective timing is right after the final mowing in late fall.