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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

Office Hours:

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

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

Map to our office

K-State Research and Extension is committed to making its services, activities and programs accessible to all participants. Reasonable accommodations for persons with disabilities may be requested by contacting Johnson County Extension at (913)715-7000. Notify staff of accommodation needs as early as possible.

Kansas State University Agricultural Experiment Station and Cooperative Extension Service

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

Agent Articles


The Johnson County Extension program has a wealth of knowledge provided by our horticulture agents. They have developed numerous articles for the local media and press releases on timely topics. These articles can assist you in finding the information you need to make wise choices in the lawn or garden.

Kansas Garden Guide Graphic                            

The Kansas Garden Guide is a fantastic resource that combines knowledge gained from decades of gardening, making it an essential sourcebook to garden throughout communities in Kansas. This is available to purchase in our office or access it  online.

The Gardening Calendar will help you plan when best to plant your garden.

Spring/Summer Gardening and Maintenance

Fall/Winter Gardening and Maintenance

Crop-Specific Topics







Sweet Potatoes



Environmental-Best Management Practices

Garden Equipment and Tools

Return to Horticulture Agent Articles