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Johnson County

Research-based Information You Can Trust — Localized for your needs

Johnson County
11811 S. Sunset Drive
Suite 1500
Olathe, KS 66061

(913) 715-7000
(913) 715-7005 fax

Map to our office

Current News

Memorial Weekend

Our office will be closed Monday, May 27.


Knowledge For Life Newsletter:

May 2019: Milkweed for monarchs; Heuchera addiction;
Slow tools for small gardens;
College debt; Avoid sugars in fruit and milk?; Camp memories


Cover of 2018 Annual Report 2018 Annual Report


Monarch catepillar on milkweed plantThe Pollinator Prairie Wonders of Discovery

Friday, June 21 ⁄ 9am – 2pm


Ash tree showing symptoms of Emerald Ash Borer


Symptoms of Emerald Ash Borer
in Kansas City Ash Trees


 Scooping soil into a plastic bag for a soil sampleUpdate on Soil Test Results

Due to the volume of soil samples submitted
for testing this spring, the turn-around time
for results is approximately 3 – 4 weeks.




Purple logo graphic of K-State Research and Extension Master Gardener Johnson County


Apply now to become an
Extension Master Gardener


 4-H campers in swimming pool

4-H Summer Camps
Registration now open!


Radon Kit

Radon Kits: Kits are available year-round



Office Hours:

Monday - Friday,
8:30 a.m. - 5 p.m.

Map to our office

Kansas State University is committed to making its services, activities and programs accessible to all participants. If you have special requirements due to a physical, vision, or hearing disability, contact Johnson County K-State Research and Extension, 913-715-7000.

Kansas State University Agricultural Experiment Station and Cooperative Extension Service

K-State Research and Extension is an equal opportunity provider and employer.