$15,000 and above
Penn State Extension Horticulture Team
Zanfel Laboratories, Inc.*
$10,000 to $14,999
Ball Horticultural
Longwood Gardens*
$5,000 to $9,999
Bartlett Tree Experts
Chanticleer*
Greater Philadelphia Gardens
Morris Arboretum
Scott Arboretum of Swarthmore College
$1,000 to $4,999
Associates of the Scott Arboretum*
Davey Tree Company*
Ernst Seeds
Fox Chapel Garden Club
Garden Accents
Master Gardeners of Allegheny County
Master Gardeners of Berks County
Master Gardeners of York County
Mt. Cuba*
PittMoss
Pride Garden Products*
Saint Joseph's University Arboretum of
the Barnes Foundation*
State Horticultural Association of Pennsylvania
Valley Forge Tourism and Convention Board*
Winterthur*
$500 to $999
Backyard Inventors, LLC
Centerton Nursery*
Deb Soutar
Delia Egan
Kevins Worldwide
Master Gardeners of Bucks County
Master Gardeners of Crawford County
Master Gardeners of Delaware County
Master Gardeners of Erie County
Master Gardeners of Fayette County
Master Gardeners of Mercer County
Master Gardeners of Montgomery County
Master Gardeners of Venango County
Master Gardeners of Washington County
Nancy Knauss
Organic Mechanics*
Rainbow Treecare Scientific Advancements
Rodale Institute*
Timber Press
The Garden Club of Allegheny County
The Hershey Company*
Tyler Arboretum*
Up to $499
Banksville Express*
Bartram's Garden*
Celeste Janosko
Dr. Jean Binstock
Emelie and Scott Swackhamer
Karel and Tony Ulizio
Master Gardeners of Beaver County
Master Gardeners of Butler County
Master Gardeners of Cambria County
Master Gardeners of Centre County
Master Gardeners of Chester County
Master Gardeners of Cumberland County
Master Gardeners of Fulton County
Master Gardeners of Lancaster County
Master Gardeners of Lawrence County
Master Gardeners of Lycoming County
Master Gardeners of Somerset County
Master Gardeners of Susquehanna County
Master Gardeners of Westmoreland County
PHS Meadowbrook Farm*
Tractor Supply*
Val and Bert Sesler
