Follow these simple steps for a greener, healthier lawn next spring!
The mat of natural materials that collect in the lawn is called thatch.
If your lawn has more than one inch layer of thatch, it creates a barrier to water, nutrients and air from reaching the soil and the roots of grass. The best time to dethatch
your entire lawn with a power dethatcher is late
summer to early fall for northern grass. Wait to dethatch southern grass until late spring when the temperatures are still cooler and the grass is actively growing.
alleviates soil compaction, encourages the uptake of nutrients and oxygen and helps breakdown thatch. It is recommended to core aerate northern grass in the fall and southern grass in mid-spring to early-summer. An excellent time to overseed is directly after aeration.
Fall Lawn Fertilization
If you only fertilize once a year, fall is the best and most important time. In the fall you are feeding your lawn to build food reserves. The roots will go into winter strong and healthy and better prepared to green up faster in spring. Northern grasses, we recommend an application of Milorganite around Labor Day and once again around Thanksgiving-before the first major deep freeze or snowfall in your area. Southern grasses also prefer a Labor Day application and an early October feeding or an application in conjunction with overseeding.
Overseeding your lawn in the fall helps to increase density and improves the overall health and appearance of the lawn. The best time to overseed cool season lawns is typically from late August to mid-September. Warm season lawns should be overseeded about one month before your average date of first frost. Overseeding can be done directly after aerating if timed correctly. If you plan on applying a pre-emergent for weed control at this time, you will have to wait until the spring to seed. If you’re just looking to reseed bare patches in the lawn, rake out the existing dead grass, add some top soil along with a handful of seed and Milorganite and gently rake in and water.
Fall is also an excellent time for sod projects, temperatures are cooler so you won’t need to worry about the sod drying out as quickly. When laying sod, it’s a good idea to spread a little top soil over the seam where two rolls of sod meet. This allows the two rolls to grow together quicker, and keeps the seams from drying out. Don’t forget to put some Milorganite down on top of the soil before laying the sod.
September and October are the best months to control perennial broadleaf weeds like dandelions, creeping Charlie, and clover. Consider removing weeds by hand making sure to remove the entire root or consider spot treating with an herbicide. If overseeding in the fall, most herbicides cannot be applied within 6-8 weeks of putting down seed. Gardening expert, Melinda Myers, shares eco-friendly weed control tips.
Once the cooler fall temperatures arrive, mowing at the highest setting on your mower should continue until the lawn begins to go dormant. Once the lawn is dormant, you can drop the height of cut to about 2" for cool season grasses and 1" for warm season species.
Leave fallen leaves on the lawn and make several passes over them with your lawn mower to mulch them small enough to stay on the lawn. If chopped finely enough, the leaves will slowly decompose and add organic matter to the soil.
Temperatures may be dropping, but lawns still need one inch of water per week whether it comes from rain fall or irrigating, as long as the lawn is growing, it needs water.
Browse our list of articles for more Fall lawn and gardening tips.