Lawn Care Tips

Lawn Care Seasonal Guide (for Johnson County, Kansas)

Caring for cool season lawns

With warmer weather comes the return of lawn care season! K-State provided the below guide for lawn care in the Kansas City metro (bluegrass and tall fescue). Hopefully you find it useful!

Mid-March
Spot treat broadleaf weeds if necessary. This controls pesky spring weeds such as dandelions, henbit and chickweed. Treat on a day that is 50 degrees or warmer. Rain or irrigation within 24 hours of application will reduce effectiveness. Liquid treatments are more effective in controlling weeds that are up and growing this time of year.

Early April
Redbud trees in full bloom? Apply crabgrass preventer. The preventer needs to be watered in before it will start to work. One-quarter inch of water will be enough to water in any of the commonly available products. Remember that a good, thick lawn is the best weed prevention.

May
Fertilize with a slow-release fertilizer if you water your lawn on a regular basis during the summer. If your crabgrass control contained a fertilizer then this application may not be necessary. No additional fertilizers are needed if you let your lawn go dormant during the heat of summer.

Broadleaf weeds can be spot treated with a spray, or use a fertilizer that includes a weed killer. Rain or irrigation within 24 hours of application will reduce effectiveness of the sprayed weed killer, but the fertilizer needs to be watered in. Wait 24 hours after the application before watering if the product is a combination of fertilizer and herbicide for best weed control.

June through Mid-July
A heavy crabgrass infestation may require a follow-up application. If necessary apply a second round of crabgrass preventer in early June. Only one application is needed if you applied Dimension (Dithiopyr) or Barricade (Prodiamine) in the spring. These two products normally provide season-long control with a single application. Remember to water it in.

If grubs have been a problem in the past, apply a product containing Imidacloprid during the first half of July. This works to prevent grub damage. It must be watered in to activate.

Early September
Fertilize around Labor Day. This is the most important fertilization of the year for cool-season grass. Water in the fertilizer for best results and use a high nitrogen source. This is also the ideal time to overseed a bluegrass or tall fescue lawn.

November
Fertilize the lawn. This is the second most important time. This fertilizer is taken up by the roots but is not used until the following spring. Water in fertilizer.

Spray for broadleaf weeds even if they are small. Broadleaf weeds are much easier to control in the fall than in the spring. Spray on a day that is at least 50 degrees. Rain or irrigation within 24 hours reduces effectiveness. Use label rates for all products!

See this article, and other great resources, on the K-State Extension Website: Lawn Care Season Guide (k-state.edu)

You may also be interested in reviewing this lawn care program offered by Grass Pad: 5 Step Idiot Proof Lawn Fertilizer Program - Grass Pad