| American Conifer Society |
| American Hosta Society |
| American Nursery & Landscape Association |
| International Plant Propagators Society |
| Interlocking Concrete Paver Institute |
| International Water Lily Society |
| Master of Pond Keeping Certification |
| National Association of Pond Professionals |
| National Koi & Goldfish Health Workshop Advanced Training Certification |
| New York State Nurserymen Association |
| New York State Turfgrass Association |
| Perennial Plant Association |
| Professional Plant Growers Association |
| Rockland County Landscape Association |