The Master Gardener Program trains garden enthusiasts to learn, grow, and teach others about plants and gardening in the home landscape. Participants receive 40 hours of training via webcasting, face-to-face, and hands-on workshops, while interacting with others of similar interests. After completing their training, Master Gardener Interns volunteer 40 hours of service in county approved projects related to gardening education to become active Master Gardeners. To maintain active status, Master Gardeners must attend at least 10 hours of county approved continuing education and volunteer at least 20 hours of service on county approved projects.

Become a Master Gardener

Applications open July 12.

If you have any questions, please email

The application is online but the classes are a combination of online and in person.

Application Details


Who are Master Gardeners?

Master Gardeners are community members from a wide variety of backgrounds. They are passionate about serving their communities and sharing gardening best practices. They have taken the Master Gardener training and share their time and expertise as volunteers in community gardens, city beautification projects, and farmers markets to name only a few areas. They love to share their knowledge and give back to the community as volunteers. Any resident of Linn County is invited to apply to become a Master Gardener.

What Happens After the Training?

After you complete your training, you'll volunteer in the community at approved Master Gardener projects throughout the county. You'll need to complete 40 hours of volunteering by December 31 of the year following the completion of your training. Projects include working in community gardens with community volunteers, administrative work, answering questions from the public, assisting at our plant sale--there are many different opportunities available.

Thereafter, you'll remain active by attending ten or more hours of continuing education and contributing 20 hours or more of volunteer community service.

Contact Us

Our Socials

Dallas County Master Gardener Demonstration Garden

View of the Garden

Check out the garden located on the Dallas County Fairgrounds. If you would like to donate please call the extension office at 515-993-4281 or mail a check to Dallas County Extension 28061 Fairground Road,  Adel IA 50003

Extra Resources

Plant Care (Hardening Transplants)

Master Gardeners suggest all plants purchased from the Plant Sale go through this process before being planted outside.

Gradually introducing seedlings to outdoor growing conditions increases their food reserves, reduces the severity of transplant shock, and increases the chance of survival in the garden. This process is called hardening.

About 7 to 10 days before setting plants in the ground, place the seedlings in a shady, protected location outdoors. Over the next several days, gradually expose the seedlings to longer periods of sunlight.

Allow the plants to dry slightly between waterings. During the hardening process, move the seedlings indoors if the forecast calls for temperatures below 40°F.

Seed Libraries
  • Adel Public Library  I  303 S 10th St. Adel
  • Dallas County Extension  I  28061 Fairground Rd. Adel
  • Fruitful Vine Garden  I  Westview Church in Waukee
  • Granger Public Library I 2200 Walnut St. Granger
  • Minburn Public Library  I  618 5th St. Minburn
  • Perry Public Library  I  1101 Willis Ave. Perry
  • Redfield Public Library I 1112 Thomas St, Redfield
  • Waukee Family YMCA  I  210 N Warrior Ln. Waukee
  • Grimes Public Library I 200 N. St. Grimes 

Gardening For Butterflies and Pollinators

Planting and Harvesting Times for Garden Vegetables

Composting Yard Waste

See more publications at the ISU Extension Store


Close up of pink Peony flower.