Owner Anthony Gould told Horticulture Week that a man using a false name rang saying he was holding a party in a country retreat in Dorset and wanted £3,000 of resin weave furniture quickly.
"We thought it was a big sale but then got suspicious," he said.
"We tried to get authorisation with the card holder not present and we would still have been liable if the card company proves it was our fault."
He warned: "if anyone is claiming they have to pick up in a hurry be careful - we nearly got stung."
Gould said the cloned card still went through after the credit card company gave authorisation on two separate cards, because they had not been reported as stolen.
He added: "No wonder these guys are getting away with it, the police didn't want to know, and were not willing to come and arrest the guy in our car park."