Peter Glazebrook entered his 8 pound 4 ounce spud into the giant vegetable competition Friday at the National Gardening Show in Shepton Mallet, Somerset, the BBC reported.
The amateur gardener says he's waiting for verification from the Guinness people but he says he thinks his "tattie" is 7 ounces heavier than the previous record holder of 7 pounds 13 ounces, the BBC said Saturday.
"I've been trying to grow these large for about 10 years and this is the largest I've managed," Glazebrook said. "It needs a long growing season to get as large as possible."
2014: The Year in Music [PHOTOS]