University of Maryland Extension

Master Gardeners


MASTER GARDENER VOLUNTEERS – For the health and safety of our communities, the UME Master Gardener Program has suspended all in-person summer programs and activities.

We will continue to monitor the situation and makes changes as “Maryland Continues to Reopen.”


Our Vision is a healthier world through environmental stewardship.

Our Mission is to support the University of Maryland Extension mission by educating residents about safe, effective and sustainable horticultural practices that build healthy gardens, landscapes, and communities.

CHECK IT OUT! 2019 Calvert Master Gardeners Annual Report

ARTICLE - 2020 Vacation Travels from Master Gardener Interns




2021 GARDEN SMARTER - Interested in a Garden Smarter lecture? POSTCARD
There are a few new garden topics, all presentations will be virtual, and if interested in attending registration is required.  Register by visiting the Calvert County Public Library website

Calvert County is one of the southernmost counties in the state of Maryland and is bordered on three sides by the Chesapeake Bay and its tributaries.  All land in the county lies within a mile of these waters and every use impacts directly on the Watershed.

Calvert County Master Gardeners (CCMGs) unite with Maryland Master Gardeners in promoting a healthier world through environmental stewardship and education about effective horticultural practices.

Every day, one or more CCMGs is working up front or behind the scenes to help county residents protect and beautify the land around us.  Many of our activities focus on community service.  Information booths and demonstrations at the Calvert County Fair, Children’s Day at Jefferson Patterson Park, Green Expo at Annmarie Gardens, and our annual Plant Sale and Clinic offer examples of best practices and materials.

Every spring, in partnership with The Calvert Library, we bring you our Garden Smarter lecture series, which focuses on timely information and practical advice. Topics frequently covered include vegetable and container gardening, native plants in the home landscape, and rain garden construction.  CCMGs also have a Speakers Bureau which can provide experts to talk to local organizations on a wide range of horticultural topics.  Please click on this link to see this years schedule.  

As CCMGs, we bring our knowledge of horticultural practices to numerous public gardens in the county.   We are participating in restoring the historic gardens at Jefferson Patterson Park.  We worked with senior citizens at the Southern Pines Community Center to promote habitat-friendly gardening by designing and producing a Butterfly Garden. 

We are available to provide educational programs to communities and actively work with them to develop community gardens.  One such activity is the Community Garden at the Chesapeake Ranch Estates. Here residents, working with Master Gardeners through their Garden Club, have helped this community develop more than 50 productive vegetable plots.

Conservation-oriented activities are an important focus for the CCMGs. Every year we participate in Patuxent River Appreciation Days, providing demonstrations and information.  We work with school children on the Green School Project.  We are designing an eco-friendly landscape and demonstration garden on the land adjacent to the Calvert County Community Resources Building, which serves as the headquarters for the Calvert County Office of the University of Maryland Extension and the CCMG membership.  

Because the Chesapeake Bay and its tributaries abut virtually all of Calvert County, we devote considerable effort to promoting the health of the Bay.  We actively support and participate in the Maryland Master Gardeners Bay-Wise Program, conducting numerous yard visits and assisting homeowners to develop Bay-friendly practices through its yard certification program.

Visit our other pages and learn more about how you can become involved in these and other exciting activities – or become a Master Gardener yourself.  

Please stop by our gardens, demonstrations, and lectures – we look forward to seeing you! 

More Information: We welcome queries about CCMG activities.  For more information on these events or on the Master Gardener Program, please contact the the University of Maryland Extension, Calvert County Office at 301-855-1150 or 410-535-3662 or email

Calvert Bay-Wise Master Gardeners

Calvert County is a long, narrow peninsula bordered on the West by the Patuxent River and by the Chesapeake Bay on the East. Our residents live within a mile or less of a shoreline or a tributary that flows directly into the River or the Bay. How we maintain our own landscapes affects the health of our local waterways, the Chesapeake Bay, our citizens and our environment. If we all change a few simple landscape practices, we can help keep Calvert and Maryland communities healthy.

The University of Maryland Extension Bay-Wise Program would like to encourage you to use sustainable management practices in your yard and garden, that will help improve the health of the Chesapeake Bay. Areas of focus include: 
Encourage Wildlife
Protect the Waterfront
Mow Properly/ Water Efficiently
Manage Yard Pests with Integrated Pest Management 
Mulch Appropriately/ Recycle Yard Waste
Fertilize Wisely
Plant Wisely
Include Native Plants

Home or Community Site Visit

Bay-Wise trained Master Gardeners are available to provide information on dealing with concerns such as storm water management, erosion, integrated pest management, composting and inclusion of native plants in the landscape. You can invite us to visit your yard or community space to provide a Consultation or Certification.

1. Download the Bay-Wise Yardstick to see how your yard measures up! Yardstick for Landscapes or Yardstick for Vegetable Gardens.

2. For more information on Bay-Wise practices, watch this video.

3. To request a yard or community space visit and to start spreading the Bay- Wise philosophy in your neighborhood, please contact the Calvert County Extension Office at 410-535-3662.

Community Events and Talks

If you would like to have Calvert County Master Gardeners provide information or give a talk to your school or community group, please call the Calvert County Extension Office at 410-535-3662.     


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