Mr Boyle planted out his Blanket Bay garden with hydrangeas 10 years ago and now gives away the blooms during the annual flowering season in January and February.
"They're pretty spectacular at the moment. I've got the operation down to a fine art," he says, of his harvesting method.
Mr Boyle gives people a pair of garden "snippers" and provides a brief lesson in how to "keep the clip nice and tidy" for when they collect their hydrangeas.
"They just throw the snippers over the fence from there and I get them ready for the next person," he said.
Mr Boyle planted 4945 hydrangeas on the 0.1ha property at Blanket Bay, about 8km from Dunedin, in 2002 as part of a fundraising venture when he was manager of the Otago Salmon Hatchery Trust facility in Sawyers Bay.
He said he was surprised at the numbers of Australian visitors this year, who had stopped to take advantage of the flowering bonanza.
