For large pots for in and outside, garden furniture and benches and items, furniture, pictures, candles, wall decorations (fish, starfish, turtles etc.), Try Muebles Ikal in Playa del Carmen!
The have great prices and see Patricia Flores and tell her you are a member of the Mayan Garden Club.
Head North from Akumal to Playa del Carmen, go to the Liverpool turn and turn back South. Just past the Pemex station there is one new building (a motel) and then Muebles Ikal.
Here are a few more pictures. Enjoy shopping!