Missouri Medical Marijuana Dispensaries Go back to directory. Grassroots OpCo MO, LLC Grassroots OpCo MO, LLC Contact: Steven Weisman 1306 N Stewart Ave Springfield MO 65802 work Work Phone: (872) 302-0289work Work Email: sweisman@grassrootscannabis.comINTERNET Categories: Missouri Medical Marijuana Dispensaries Updated 4 months ago.