- America in Bloom
- Association of Outdoor Lighting Professionals (AOLP)
- Australian Institute of Landscape Designers and Managers (AILDM)
- Canadian Nursery Landscape Association (CNLA)
- Ecological Landscaping Association (ELA)
- Green Business Certification (GBCI) – LEED and SITES
- Green Roofs for Healthy Cities (GRHC)
- Holden Arboretum
- National Association of Landscape Professionals
- Plant Conservation Alliance (PCS)
- Society of Garden Designers (SGD)
