FALL SEASON TIPS
Question: How High Should Grass be Cut in Fall?
Answer: An optimal height for a cool-season grass in fall is about 2 1/2 inches. And at each mowing, you should only be removing about the top 1/3 of the grass blade. Consequently, a good time to mow lawns is when your grass is about 3 2/3 inches high. Why is 2 1/2 inches an optimal grass height? Well, what you're striving for is a balance. On the one hand, mowing the grass is like "pinching" a garden plant to stimulate rugged growth. So if you're letting the grass get tall, you're not mowing very much, which means you're passing up opportunities to make your lawn healthier and more attractive. But if you cut grass too short, you stress it.
Question: How long into the fall season should I continue to mow the lawn?
Answer: This one's a lot easier to answer than you might imagine. Simply continue to mow the lawn until the grass stops growing! Weather will determine this, not some artificial deadline.
Question: How long can you let leaves sit on the grass before raking?
Answer: A general consensus is that leaving leaves on the lawn for more than three or four days may be unwise. That said, other factors must be taken into account, too. How thick is the layer of leaves? Have the leaves been matted down by rain? The thicker the layer and/or the wetter the leaves, the sooner you should rake or otherwise remove them.