The Greenhouse site (16 AV 2) is an archaeological site of the Troyville-Coles Creek culture (400 to 1000 CE) in Avoyelles Parish, Louisiana.
Greenhouse is the most extensively excavated Troyville-Coles Creek site in Louisiana. The site consists of seven platform mounds surrounding a central plaza that measures by . Archaeologists have not found an associated village for the site, which supports the theory that the site was ceremonial in nature and that its builders lived elsewhere. Mound A ( in height, with a base square and a summit square), Mound E ( in height, with a base square and a summit square) and Mound G are the 3 largest mounds at the site and form a triangle.