April 13, 2022 - 6:17am | By Kyle Cornell Photo by: WDAY Radio Staff (Fosston, MN) -- A wood burning stove is believed to be the cause of a greenhouse fire. The blaze broke out Tuesday morning at a greenhouse near Fosston. The Polk County Sheriff's Office says the stove had been used to heat the greenhouse. The greenhouse was moderately damaged. Tags: FosstonPolk County Sheriff's OfficeGreenhouse Fire