Speaking at a dairy farm Tuesday outside Brockville, Ontario, Tory said any public institutions -- including schools, jails, hospitals and government buildings -- should have to serve Ontario-grown produce.

Although Tory admitted it was hard enough getting his own four kids to eat broccoli, let alone the entire provincial bureaucracy, he said it's worth a try.

"What I want to have in place are very clear guidelines that say if you are using taxpayer money in a public building, whether it's at a college or a hospital ... you are buying and serving Ontario produce," Tory said at Roosberg Farms in the farming town of Athens.

It's not enough to run "feel-good ads" about Ontario produce, Tory said. Not only should Ontario fruits and veggies be served in public buildings, they should also be clearly designated in the grocery store, Tory said.

"I would rather spend the money on having really good promotions that would get people in to buy Ontario broccoli or Ontario asparagus or Ontario apples than to have the feel-good ads on television that don't really tell anybody anything," Tory said.

All three party leaders are spending the day in rural eastern Ontario, wooing farmers at the international plowing match where they will go head-to-head on tractors.