I'm in the process of renovating a condo and could use some planters for the balcony with some hardy plants to help block some of the sun. 

 

Do you guys know of any garden centers that are a one-stop-shop for this sort of thing and who could help deliver the plants too? I read that there are a lot of plant vendors at Chatuchak but they don't deliver. 

This is available but depends on where you are located and finding a local plant nursery that will provide this service.  Near our home in Samut Prakan (SE coastal outskirts of Bangkok proper) we have a neighborhood plant shop that sells plants and containers, plants them up and delivers on order.  Some shops will provide the potted plants, but don't deliver. In that case you can hire a pickup or songtiew for the transport.

 

Did you ask around at Chatuchak? Some may not but you might find one who will pot and deliver. Most of them have pickups to get their plants to market. Money talks, if they are hesitant, make a generous offer.