Christopher Ogley knocked down Roger Pell and reversed over him as he tried to escape Spring Green Nurseries, in Crofton, West Yorkshire with three stolen vases worth £73.
Leeds Crown Court heard how Ogley, hit the man with the door of his getaway vehicle before driving back over him – leaving the pensioner with a broken finger and tyre marks on his body.
Pell and his grandson Jonathan had approached Ogley in the garden centre car park, after the defendant took the vases without paying on August 16.
Ogley pleaded guilty to theft, dangerous driving, failing to stop after an accident and assault last month and received a two-year community order and banned him from driving for a year.
Jonathan Pell said: "It’s disgusting really how someone can do that and virtually get away with it. It makes me angry.
"It sends a message that you can go out and steal something and because you’ve admitted it, you can walk away."