Fall Maintenance Tips for Your Bluegrass or Fescue Lawn

Fall Maintenance Tips for Your Bluegrass or Fescue Lawn

Fall Maintenance Tips for Your Bluegrass or Fescue Lawn

September 22nd is here and so is the first day of fall! As outdoor temperatures drop, your soil conditions change and, as a result, the nutrients your grass requires also alter. It’s important that you also change up your fall maintenance plans for your cool season grasses such as bluegrass and fescue. Read on for a full compilation of fall lawn maintenance tips including mowing heights, watering schedules, weed control and many others. Be sure to also check out our Homeowner Maintenance Guides for generic bluegrass, Bella® Bluegrass or generic fescue. If you’re looking for maintenance tips for a different type of grass, take a look at our Fall Lawn Maintenance Tips article.

Fall Mowing for Bluegrass and Fescue

The height you usually mow your bluegrass or fescue year-round should typically fall within the 2.5–3.5 inch range. The mowing height should remain the same during the upcoming cooler months months. This mowing height helps to prevent snow mold in snow prone regions. If you would like to learn more about generalized mowing heights for each grass type, visit our Lawn Mowing Guide.

Fall Watering for Bluegrass and Fescue

It’s a good idea to water your lawn less as temperatures drop. Too much water will lead to disease around this time. Temperatures are changing and so are soil conditions—in turn, this invites perfect conditions of fungus outbreaks. Having a carpet of leaves that create shady areas in your lawn may contribute to the likelihood of turfgrass disease as well. You will still want to water to prevent drought stress while the grass is actively growing. Read our blog on Autumn’s Fallen Leaves: How to Manage Them to learn more. Bluegrass and fescue require about 1–1.25 inches of water per week including rainfall. Watering in the early morning will decrease the risk of certain turfgrass disease. If you would like to learn more about irrigation for each grass type, visit our Lawn Irrigation Guide.

Fall Fertilization for Bluegrass and Fescue

Fertilization differs this time of the year compared to the other active growing seasons. As previously stated, outdoor temperatures are starting to change—so are soil conditions. Your grass is a living thing that needs specific nutrients at this time. Sod University recommends two different fertilizer options for the fall. You will only need to use one of the two options for fall fertilization. The Fall Fertilizer Box, in particular, has three separate bottles of fertilizer in it that help your lawn recover from the hot summer temperatures it just endured as well as prepare for the colder temperatures ahead.

In the early fall, you will start off with applying Boost to revitalize the green leaf blade color after the heat of summer. The rapid green-up of your lawn will last from the time of application through the remainder of the growing season with Boost’s time release formula. In the mid-fall, you should make an application of the second bottle in the box, Maintain, for well-balanced nutrition. Maintain serves to help with color retention late into the cooler months ahead and fortifies the root system to help it survive throughout dormancy or snow. In the late fall, you should apply Recover to prepare your lawn for environmental stressors of this colder weather.

Lawnifi Foundation is a slow-release granular fertilizer option that comes in a 25 pound bag and lasts for three months. With a 29-0-5 NPK formulation, Lawnifi Foundation is the perfect granular fertilizer for lawns and gardens. The two percent iron included in Lawnifi Foundation’s mixture helps plants carry oxygen throughout the leaves, roots and other parts of the plants to promote a green, healthy lawn. Featuring slow-release nitrogen, Foundation gradually feeds your lawn over an extended period of time without overwhelming your lawn with nitrogen during the fall. Both Lawnifi Foundation and the Fall Fertilizer Box cover 5,000 sq. ft. Learn more in Granular vs. Liquid Fertilizers or by clicking on the two products below. For more generic information about the Lawnifi brand, read Why Use Lawnifi Fertilizer?.

Fall Weed Control for Your Bluegrass or Fescue

Your bluegrass or fescue lawn has just made it through the summer months when it is not a recommended time for herbicide applications due to hot temperatures. Now that it is starting to cool down, you are free to apply both post-emergent and pre-emergent herbicides without risking any damage. You may even notice that the weeds from summertime are starting to die off. Unfortunately, there are winter weeds that will start to pop up when the months are colder too.

A post-emergent herbicide controls any current weeds you are experiencing whereas a pre-emergent herbicide, as its name suggests, serves to prevent weeds from appearing. Fall is actually the best time to apply a pre-emergent—especially if winter weeds have been a big problem in the past years. You can also do this in the springtime around March or April. You can read more about pre-emergent applications in the fall in How to Use a Pre-Emergent Herbicide in the Fall. Some hard to control weeds that may appear around this time include chickweed, henbit, Poa annuacrabgrass or goosegrass.

  • Coverage: 50 lbs. covers about 12,500 sq. ft.
  • Active Ingredient(s): Prodiamine 0.37%.
  • Ease of Use: Requires granular drop or broadcast spreader for application.
  • Best Used On/For: Established warm and cool season turfgrass before weeds appear.

  • Coverage: 5 lbs. covers between 50,000–80,000 sq. ft.
  • Active Ingredient(s): Prodiamine 65%.
  • Ease of Use: Requires tank mixing and application with a sprayer.
  • Best Used On/For: Established turfgrass before weeds appear.

Dimension 2EW Half Gallon

  • Coverage: 0.5 gallon covers between 87,000–228,000 sq. ft.
  • Active Ingredient(s): Dithiopyr 24%.
  • Ease of Use: Requires tank mixing and application with a sprayer.
  • Best Used On/For: Established turfgrass before broadleaf weeds appear.

Read product labels before application.

Fall Lawn and Garden Herbicide Applications

Pictured above: Poa annua.

Fall Insect Control for Bluegrass and Fescue

It is better to apply an insecticide as a preventative as opposed to having to resolve an infestation once damage has already occurred—it’s probably less expensive too. Apply a broad-spectrum insecticide to prevent any harmful insects from taking over your grass. Although there could be a variety of insects that may be invading your lawn at this time, the main ones most universities recommend you look out for in your zoysia are grub worms. If you have insect activity, treat with an insecticide labeled to treat the insect you are seeing. If you use a granular variety, water the lawn immediately after application to help with absorption.

Spectracide Triazicide

  • Coverage: One bottle covers 2,500 sq. ft.
  • Active Ingredient: Gamma-Cyhalothrin 0.08%.
  • Ease of Use: Easy to use and attaches to the end of your garden hose.
  • Best Used On/For: Outdoor general insect control.

Merit 2F liquid

  • Coverage:  240 mL covers between 14,000–17,000 sq. ft.
  • Active Ingredient: Imidacloprid 21.4%.
  • Ease of Use: Requires tank mixing and spray application.
  • Best Used On/For: Liquid broad-spectrum systemic formulation used for outdoor insect control.

  • Coverage: 30 lbs. cover between 16,000–21,000 sq. ft.
  • Active Ingredient: Imidacloprid 0.5%.
  • Ease of Use: Requires a drop or broadcast spreader for application.
  • Best Used On/For: Broad-spectrum systemic formulation that offers preventive and curative treatment of insect control in turfgrass and landscape ornamentals.

Read product labels before application.

Fall Fungus Control for Bluegrass or Fescue

This is the time of year for fall fungus outbreaks like large patch so be on the the lookout for any signs of diseases. If large patch or other diseases are a common problem in your grass, apply a fungicide at a preventative rate. This will help the grass enter colder months in a healthier condition. If you have had a fungus before, you may need to make multiple applications in affected areas. If you use a granular variety, water the lawn immediately after application to help soil absorption. Consider mapping those areas because fungicide treatment can be expensive.

Spectracide Fungus Insect Control Hose End

  • Coverage: One bottle covers 2,500 sq. ft.
  • Active Ingredient(s): Propiconazole 1.45% and Lamda-cyhalothrin 0.08%.
  • Ease of Use: Hooks up to your garden hose for an even spray application.
  • Best Used On/For: Outdoor topical/contact fungus and general insect control.

  • Coverage: 10 lbs. covers between 2,500–5,000 sq. ft.
  • Active Ingredient(s): Azoxystrobin 0.31%.
  • Ease of Use: Requires a drop or broadcast spreader for application.
  • Best Used On/For: Systemic strobilurin fungicide used to control certain turfgrass diseases.

  • Coverage: 2 lbs. covers between 21,000–53,000 sq. ft.
  • Active Ingredient(s): Trifloxystrobin 8.33%, Tradimefon 41.67%
  • Ease of Use: Requires tank mixing and spray application.
  • Best Used On/For: Preventative disease control.

Read product labels before application.

Lastly, lawn patch work and light topdressing with a sand and topsoil mix is a great way to recover any weak areas in your lawn that were caused by the summer heat. If you notice any hot spots, apply a light layer of topdressing to help it recover.

You can also check out our individual Homeowner Maintenance Guides for generic bluegrass, Bella Bluegrass or generic fescue.

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