Johnson County Master Gardeners


Thank you for your interest in contacting the Johnson County Master Gardeners Hortline. Although we're not in the office due to a concern about health and safety of our volunteers during the coronavirus pandemic, we are checking our voicemail and email messages at When you send an inquiry, please include your email, phone number and mailing address so we can get material to answer your questions. Thank you. Be well. Stay safe.

Master Gardener Hortline Hours- 

The Johnson County Master Gardeners are staffing the Hortline service for area homeowners and garden enthusiasts. The Hortline, staffed by volunteers, will be open 9-11am on Thursdays. You may speak to a Master Gardener by calling 319-337-2145, leave a message, email or stop by the Johnson County Extension Office, located adjacent to the Johnson County 4-H Fairgrounds at 3109 Old HWY 218 S. You may email your questions to the Johnson County Master Gardeners at and they can assist you with questions ranging from lawn care to fruit/vegetable production to ornamentals to pest management and much more. To learn more about how to become a Master Gardener, visit
2019 Annual Project Report
Hortline Advertisement Flyer
Typical JCMG Horline Hours:
April - October Monday 9-11am, Wednesday 1-3pm, Friday 9-11am 
November - March Thursday 9-11am

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