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Fall Fertilizer Application Timing #887904

Asked October 14, 2024, 12:32 PM EDT

Hello, 

My lawn soil test (conducted by the U of M) recommended Nitrogen at 2lb/1000sf and Potash at 1lb/1000sf -- report is attached. I am located in the Minneapolis area. 

When should these fertilizers be applied to my lawn this fall looking at the extended forecast? My irrigation system will be blown on on 10/23, will the Nitrogen fertilizer burn my grass if the application is done after this date and I am unable to water it in? 

Should I apply 1lb/1000SF of Nitrogen this fall, and then another application in the Spring? 

Soil Test Report 92186.pdf

Hennepin County Minnesota

Expert Response

Good Morning Tom, 

Thank you for contacting the U of M Extension Service. 

Please click on the following link which is a lawn care calendar: https://extension.umn.edu/planting-and-growing-guides/lawn-care-calendar

We are just on the tail end of fertilizer season. 

The soil test states: 

*CAUTION! Do not apply more than 1 lb. nitrogen per 1000 sq. ft. in one application to avoid burning the grass, unless a slow release form or organic fertilizer is used. It is recommended that up to 50 percent of the nitrogen be of the slow release form.

Good Luck!

Maureen Graber Replied October 15, 2024, 9:29 AM EDT

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