A plant cover device (630, 730) may include an enclosure (631, 731) having panels (204, 634A) coupled together to define a plant-receiving cavity. Each of the panels (204, 634A) has a major mesh surface (635A), and a seam (208, 302, 636A) extending along a peripheral edge (646A) of the major mesh surface (635A), Adjacent panels (634A) are coupled together at respective seams (636A). The enclosure (631, 731) may include a first fastener (637, 640) adjacent the peripheral edge (646A) of a respective panel (634A, 634B). The plant cover device (630, 730) may have a base (100, 632) coupled to the enclosure (631, 731) and including a solid major surface (638) extending radially outward, and a second fastener (637, 640) carried by the solid major surface (638) and extending radially. The plant cover device (630, 730) may also include a support (633, 733) extending vertically from a ground surface to an apex of the enclosure (631, 731). The first fastener (637, 640) and the second fastener (637, 640) may be aligned and configured to provide access to the plant-receiving cavity.