A plant cover device may include an enclosure having an upper end, a lower tubular end opposite the upper end, and a medial seam coupling the upper end and the lower tubular end. The upper end may include panels coupled together to partially define a plant-receiving cavity therein. Each of the panels may have a major mesh surface, and a panel seam extending along a peripheral edge of the major mesh surface, adjacent panels being coupled together at respective panel seams. The lower tubular end may include a major mesh surface and having a first end and a second end opposite the first end, the first end being coupled to the medial seam. The lower tubular end may also partially define the plant-receiving cavity therein. The enclosure may have a curved flexible support carried by the medial seam, and a pole extending vertically from a surface to an apex of the enclosure.