Glenn W. Martin said he used to secretly grow marijuana plants among the deciduous and evergreen trees on his family farm in Maine, selling the illegal products in Boston and New York to help cover escalating property taxes and other expenses. Now Martin, 34, cultivates the herb openly in a small greenhouse by his home. He is part of an expanding industry of farmers and other entrepreneurs seeking to profit from a Maine law that allows patients to buy marijuana, as well as to cultivate their own.
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