Mid August to October is a great time to take care of your lawn to ensure its success for the next year. September is a good time for seeding too because the temperature is cooler but the soil remains warm and encourages root growth. Your turf will focus on establishment as opposed to top growth like it does in spring.
1. September through October is the best time to treat for weeds. Try Bonide Ultra Weed Beater which can withstand temperatures down to 40°, it will fight the toughest weeds. Or Consider Ortho Chickweed and Clover. You get great “translocation” into the root system when applying a weed control in fall resulting in better and more complete kill.
2. By seeding in the fall it increases the chance of survival into the spring time. Flowerland recommends a blend of two to three types of grass seed. One type for quick growth while the other fills in later.
3. Add a seed starting fertilizer when planting new seed.
For established lawns there is no better time to fertilize than the fall. It helps establish thick healthy turf and aids in a quick green up for the spring time.
4. It is important to cover new grass seed with mulch to hold in moisture and nutrients. If the grass seed dries out, it takes longer for them to grow or they might not root at all. You can use clean straw or Penn mulch.
5. Don’t cut more than 1/3 of the grass blade per mowing. Make sure to have sharp mower blades. We recommend for healthy turf to maintain a turf height of 3 to 3 1/2 inches. The last couple times you mow for the season (generally early November) lower the deck on the mower. This will reduce snow mold and suffocation of the roots. You can also finely mulch some leaves into the turf.