Hi Dana,

Thanks for the questions. Given the short growing season for Summit County, a slow release fertilizer application after lawns have greened up in spring is a good approach. Slow release products release fertilizer over a period of 10-12 weeks, which provides fertilizer/nutrients to the lawn throughout the growing season with just one fertilizer application. Quick release/water soluble fertilizers will green up the lawn faster, but the fertilizer will affect the lawn's appearance for only 4-6 weeks, and may require multiple applications per year. 

The best way to minimize weed problems in lawns is through the use of good cultural practices: proper mowing height and frequency, sensible fertilization, and adequate irrigation. Lawn weeds are encouraged by: mowing too short or not often enough; fertilizing too much, not enough, or at the wrong time of the year; and over- or under-watering.

If chemical control is necessary, the best time to apply herbicides for the control of perennial broadleaf weeds is early fall (September is often a good time). Applications in late spring or early summer period after the weeds have flowered are also highly effective. Be extremely cautious using herbicides near ornamental plants, trees, flowers, and vegetable gardens. These plants can be damaged by herbicides through accidental direct application, through drifting through the air, or through volatilization (where the herbicide turns into a vapor). Use herbicides only when temperatures are between 65 and 85 degrees Fahrenheit. Do not apply it when temperatures are expected to rise above 85 degrees Fahrenheit within 24 hours of application. To minimize the danger of herbicide drift, spray weeds during a calm part of the day when there’s little or no wind. Don’t apply when rain is expected within 24 hours of application, and avoid watering for 24 hours after application.

I hope this information is helpful,
Chris

Chris Hilgert
CSU Extension Horticulture Specialist





Thank you so much!

On Jul 22, 2024, at 4:15 PM, Ask Extension <<personal data hidden>> wrote:



Hi Dana,

Common lawn species include Kentucky Bluegrass (full sun - partial shade areas), Tall Fescue (full sun - part shade), and Fine Fescues (best option for shade, also does well in sun, and can be a good option for reducing water, fertilizer, and mowing needs). 

Thanks again for reaching out,
Chris

Chris Hilgert
CSU Horticulture Specialist