Yardistry Cedar Poly Greenhouse at Costco! by Rhonda April 6, 2022 April 6, 2022 3/10/22. The Yardistry Cedar Poly Greenhouse from Costco is a ready-to-assemble kit that comes with all the wood pre-cut, pre-drilled, and pre-stained and includes all hardware and metal components. This… 1 FacebookTwitterPinterestEmail