Definitions for "Master Gardener"
a gardening enthusiast of any age, who has been formally trained in Horticulture by the Extension Service
an individual who acts on behalf of the University of Arizona Cooperative xtension as a volunteer educator within his or her community after receiving specialized training in horticulture
a specially trained Cooperative Extension volunteer who has completed a comprehensive home horticulture training program under the supervision of the Cooperative Extension horticulture advisor