A company that relies on paper is planning to plant 250 trees in Pittsburgh’s parks.Boston-based Riso, which makes digital printers and photocopiers, announced Tuesday that it will begin the plantings this weekend in Riverview Park in the North Side.

That planting will commemorate the grand-opening of the company’s North Shore branch, which it opened about a year ago, after nine years in the South Hills.

“Twice a year for the next four years we’re going to do spring and fall plantings in Pittsburgh’s parks,” said branch manager Rick Laird. “We really want to make an impact in Pittsburgh.”

The company plans to plant 100,000 trees in U.S. parks as part of a partnership with the Arbor Day Foundation.Office Technology Magazine this year recognized Riso as the “most green” office technology dealer because of its focus on environmental stewardship. The company’s copiers use soy-based ink and conserve energy.

All the trees to be planted in Pittsburgh are native to Western Pennsylvania and include cucumber magnolia, American beech, redbud, tulip poplar and serviceberry.

“We’ve lost many trees over the years,” said Phil Gruszka, director of management and maintenance at the Pittsburgh Parks Conservancy. “We’ve found that there are a number of places that currently don’t have trees that should, so we definitely appreciate this.”