Abstract: A polymeric tag has a body and an integral insertion leg which is tapered to facilitate insertion either into the soil or into a slot formed in the edge of a pot. Spaced from the end on each edge of the leg and in alignment with one another along the longitudinal length of the leg are convex outwardly extending projections immediately adjacent a symmetrical concave indentation on a side proximate the tag body. The combination of the curvilinear convex projections and concave indentations provides an easily insertable mechanism for allowing the insertion of the tag into the slot of a pot, and, once the convex projection clears the edge of the slot, the tag is locked in position with the concave indentation engaging the edges of the slot and the convex projection extending beyond the edge of the slot and engaging the underside of the pot rim.