millworkman said:Talk to your local "contractor only" garden center. The one around here has an acre of unused pots just sitting around and they were happy to give me some. I took as many as I could fit in my little coupe.
Another is talk to any landscaping company. I used to work for TruGreen landcare and we would just throw away all those black nursery pots the trees & shrubs came in. I used to take them home by the truckload.