Berks Nature, Berks County
Blue Mountain Eagle Climbing Club, Berks County
Bowman’s Hill Wildflower Preserve, Bucks County
Brandywine Conservancy, Chester and Westmoreland Counties
Friends of Silver Lake Nature Center, Bucks County
Friends of the Wissahickon, Philadelphia County
Green Lane Park, Montgomery County
Green Valleys Watershed Association, Chester County
John James Audubon Center at Mill Grove, Montgomery County
Lancaster County Conservancy, Lancaster County
Lancaster County Parks, Lancaster County
Longwood Gardens, Chester County
Let’s Go Outdoors, Philadelphia County
Mt. Cuba Center, Hockessin, Delaware
Natural Lands, Delaware County
Nine Mile Run Watershed Association, Allegheny County
Pennsylvania Horticultural Society, Philadelphia County
Perkiomen Watershed Conservancy, Montgomery County
Renfrew Institute, Franklin County
Riverbend Environmental Education Center, Montgomery County
Schuylkill River Development Corporation, Philadelphia County
Strawberry Hill Nature Preserve, Adams County
The Land Conservancy for Southern Chester County (TLC), Chester County
Tree Pittsburgh, Allegheny County
Washington County Watershed Alliance, Washington County