- Garden Design Magazine & Websitewww.gardendesign.com
- National Association of Landscape Professionals (NALP)www.landscapeprofessionals.org
- Association of Professional Landscape Designers (APLD)www.apld.org
- The Lawn Institutewww.thelawninstitute.org
- U.S. Environmental Protection Agency (EPA) – Landscaping & Green Infrastructurewww.epa.gov
