Epiphytic lichens face increasing threats in per-humid temperate and boreal forests where many species are declining. A significant threat to some lichens, particularly those with a cyanobacterial symbiont, is overgrazing by invasive gastropods. This study tests two possible applied conservation measures that could reduce overgrazing from invasive gastropods or promote faster lichen recovery: (1) fertilization with potassium phosphate solution, and (2) slug exclusion via wrapping copper foil around tree bases. Our study took place in a lowland mixedwood forest in Nova Scotia, Canada. Over two years, we measured thallus size, lobe elongation, and grazing damage on two replicate thalli of Lobaria pulmonaria across each of 40 trees. Results indicated that gastropod exclusion significantly enhanced thallus size and lobe elongation, but phosphorus fertilization produced only modest effects. These findings suggest that the exclusion of terrestrial slugs via physical barriers could mitigate grazing pressure, potentially supporting the recovery of endangered cyanolichens. We also recommend further testing of potassium phosphate fertilization as a recovery support measure, particularly in ecosystems that are more likely to be phosphorus limited. Keywords: Lichen, epiphyte, Acadian Forest, Nova Scotia, species at risk, slug.