The University of Arizona

College of Agriculture and Life Sciences

Improving Lives, Communities and the Economy

How do I become a Maricopa County Master Gardener?

Master Gardeners sponsor an annual Garden Tour

Master Gardener Initial Training classes are taught by University of Arizona Cooperative Extension faculty, industry professionals and other horticulture experts. The program teaches the fundamentals of selecting, installing, and maintaining healthy, appropriate landscapes and gardens for the Arizona low desert.The cost of the 17-week training is $275.00,

Class Topics include:

  • Botany
  • Plant Problem Diagnosis
  • Soils
  • Ornamentals
  • Pest Management
  • Fruits
  • Vegetables and Herbs
  • Plant Propagation
  • Turf
  • Desert-Adapted Landscape Plants
  • Cacti and Succulents
  • Composting
  • Landscape Design
  • Irrigation and Landscape Watering

Training sessions are held at the Maricopa County Cooperative Extension building:

4341 E. Broadway Rd., Phoenix, AZ 85040.

Classes meet once a week for three-hour sessions for 17 consecutive weeks. We typically hold two training sessions a year, one running from January to May (Winter) and the other from July to November (Summer). Please check back for updated class announcements.

To become a Certified Master Gardener, participants must complete the initial training class and donate 20 hours of volunteer service within the duration of the training. There are a wide variety of service opportunities available ranging from answering gardening questions from the public, to planning public events, to working with school gardens. To remain a Certified Master Gardener after the first year, a donation of 25 hours of volunteer service and 12 hours of continuing education is required.

Applying to be a Master Gardener Volunteer

Anyone with an interest in landscaping, gardening, or natural resources AND volunteering can apply for the Master Gardener program. If you have an interest in improving your skills and knowledge and the desire to work with people, the Master Gardener program may be for you. There are frequently more applicants for the program than slots available. Selection is based on history of volunteer service and level of specific skills and knowledge of value to the program. Please pay close attention to the deadlines on the application.

Winter Session:

Dates January 17 - May 9, 2017

Time: 9:30 am - 12:30 pm

Location: Cooperative Extension building

4341 E. Broadway Rd.

Phoenix, AZ 85040

9:30 am to 12:30 pm

The application will be available online in the Fall. If you would like to be notified when the application is available, please email

The session fee is $275.00,

Persons with a disability may request a reasonable accommodation, such as sign language interpreter, by contacting the Master Gardener Program Coordinator, 602-827-8200. Requests should be made as early as possible to allow time to arrange the accommodation.

Artichoke in Master Gardener Demonstration Garden      Trainees have a big part to play in this annual event.

Short URL: