Lawn and Garden
Welcome to growing plants in Riley County. I love to make site visits when time allows. Make an appointment for me to stop-by.
We are blessed with many different growing conditions for you to express your gardening style. There are deep soils along our water ways and shallow rocky soils on our hills. Average rainfall is 4 inches different b
etween North and South Riley County.
You are invited to bring in samples to the office of plants, insects, soil and diseases along with your questions for the Agent to assist you with.
Riley County Conditions
Historical Weather
Select the location you desire for information and the time span.
Weather Data Library
Access previous rainfall, soil temperature, and wind conditions for Manhattan
Average Last Spring Frost = April 18, May 9 is 95% frost free date
Average First Fall Frost= October 15
179 Growing Days
Average Rainfall in Manhattan = 34.8 inches
Average Rainfall for Riley County= 32.4 inches
Soil pH range 3.8 – 10, average is 7.2, most common 7.7, 6.5 is preferred
Cold hardiness Zone 6a = -10° to - 5° F.
Heat Zone 7= 60 - 90 days (average number of days per year above 85° F.)
Resources
Pollinator Gardens
Pollinator Gardens are important habitats for a healthy community. Learn more at the Sunset Zoo
Planting Natives https://plantnativeks.weebly.com/
Project EverGreen is a nationwide outreach program connecting local lawn and landscape firms with men and women serving our country in the armed forces away from home.
Horticulture Information Center
Gregg Eyestone
Horticulture Agent
Riley County Extension Office
785-537-6350