A plant matter drying system includes an enclosure with a door and an internally mounted ultraviolet lamp for disinfecting plant matter. A heating element creates an internal temperature that is higher than ambient temperature and a fan circulates air within the enclosure and over the plant matter, thereby drying and/or decarboxylating (depending upon the internal temperature and time periods) the plant matter that is positioned within the system. During decarboxylation, the ultraviolet lamp is operated for less time than is the fan and heating element. In some embodiments, vents exchange air within the enclosure with air external to the enclosure.
