As an Oregon farmer, Scott Cully grows one of nature’s smallest fruits: blueberries. But his passion in life — or “quest” as he calls it — leads him to the world’s largest pumpkins, which he transforms into the world’s largest jack-o-lanterns.

This past weekend, Cully’s quest brought him to the north Bronx’s New York Botanical Garden, where he molded the latest record-breaking pumpkin into a spooky and somewhat gory three-faced jack-o-lantern.

“It’s great, I’ve never seen anything like it,” said Garden volunteer Marge Graham.

The giant pumpkin-carving bug bit Cully on a sunshine-drenched fall day in 1988 when he was living in Hartford, Conn., where he grew up (he now lives in Eugene, Ore.). After harvesting a 400-pound pumpkin from his personal patch, Cully sat down with his wife, a “smoking hot” pitcher of apple cider, a bunch of knives and went to work. He took the jack-o-lantern to a Halloween party that night. It was a hit. He’s been carving enormous pumpkins ever since.

Cully says he usually carves about 10 to 12 pumpkins a year; at casinos, shopping malls and county fairs throughout the United States. “I always try to find the biggest pumpkins,” he says.

And he has. Cully holds the Guinness World Record for carving the world’s largest pumpkin. This year’s record-breaker was grown by Chris Stevens in New Richmond, Wisconsin. Stevens brought the pumpkin to New York in the back of a pickup truck. At 1,810.5 pounds, the pumpkin contains enough flesh to make 900 pumpkin pies.

Stevens’ pumpkin, along with the other two pumpkins on display — weighing in at 1,725 pounds and 1,674.5 pounds — made up the largest three pumpkins in the world this year, according to the Great Pumpkin Commonwealth, the governing body of more than 80 pumpkin weigh-ins worldwide.

The gregarious Cully, who brought his wife and daughter out to New York to join him, started carving on Friday morning. In between cuts with a vast array of carving tools, he posed for photos with Garden visitors, making faces and stabbing motions toward his latest creation. He finished up on Sunday afternoon, just barely holding the mammoth pumpkin together using various rods and wraps to keep everything in place.

Flanking Cully’s piece were two almost-as-big pumpkins carved by Westchester pumpkin-carving artists Michael Natiello (who turned his into a furrowy-browed, big-eyed face with a stem nose) and Sara Mussen (hers consisted of spiders and spider webs: “a little creepy but not too scary”).

Mussen and Natiello both praised Cully’s work and said they enjoyed watching him come up with his vision.

“He’s really passionate about it,” Natiello says.