| Allegany | sllewell@umd.edu | https://extension.umd.edu/locations/allegany-county/home-gardening/ | |
| Anne Arundel | maxyoon@umd.edu | https://extension.umd.edu/locations/anne-arundel-county/master-gardener-program/ | |
| Baltimore City | Bay-Wise@umd.edu | https://extension.umd.edu/locations/baltimore-city/master-gardener/ | |
| Baltimore County | aleeser@umd.edu | extension.umd.edu/locations/baltimore-county/home-gardening-master-gardeners | |
| Calvert | cdigiova@umd.edu | extension.umd.edu/locations/calvert-county/master-gardener | |
| Caroline | Bay-Wise@umd.edu | https://extension.umd.edu/locations/caroline-county/contact-us/ | |
| Carroll | schris12@umd.edu | https://extension.umd.edu/node/1488/ | |
| Cecil | dbehnke@umd.edu | extension.umd.edu/locations/cecil-county/master-gardener | |
| Charles | jrycyna@umd.edu | extension.umd.edu/locations/charles-county/master-gardener/bay-wise | |
| Dorchester | ezobel@umd.edu | https://extension.umd.edu/locations/dorchester-county/horticulture-and-master-gardener/ | |
| Frederick | arenbold@umd.edu | https://extension.umd.edu/locations/frederick-county/home-gardening | |
| Garrett - Water-Wise | abachtel@umd.edu | https://extension.umd.edu/locations/garrett-county/master-gardener-program/ | |
| Harford | imooney@umd.edu | https://extension.umd.edu/locations/harford-county/home-gardening-and-master-gardeners/ | |
| Howard | Bay-Wise@umd.edu | https://extension.umd.edu/locations/howard-county/environment-and-natural-resources/master-gardener/bay-wise-landscape-management |
| Kent | rhanway@umd.edu | https://extension.umd.edu/locations/kent-county/home-gardening/ | |
| Montgomery | mgmont@umd.edu | https://go.umd.edu/mcmg | |
| Prince George's | estherm@umd.edu | https://extension.umd.edu/locations/prince-georges/master-gardeners | |
| Queen Anne's | rjrhodes@umd.edu | https://extension.umd.edu/locations/queen-annes/home-gardening/ | |
| St. Mary's | cdigiova@umd.edu | https://extension.umd.edu/locations/st-marys-county/home-gardening/ | |
| Somerset | rosnkrnz@umd.edu | https://extension.umd.edu/locations/somerset-county/ | |
| Talbot | mboley@umd.edu | https://extension.umd.edu/locations/talbot-county/horticulture-and-master-gardener Washington | |
| Washington | acormany@umd.edu | https://extension.umd.edu/locations/washington-county/home-gardening/ | |
| Wicomico | rosnkrnz@umd.edu | https://extension.umd.edu/locations/wicomico-county/ | |
| Worcester | rosnkrnz@umd.edu | https://extension.umd.edu/locations/worcester-county/home-gardening-master-gardeners/ | |
