ishs_logoAmerican Hort
  American Landscape Institute
 American Society of Landscape Architects


 ishs_logoHorticultural Research Institute


 International Plant Propagators’ Society
A select group of plant propagators who promote the seeking and sharing of information about the art and science of plant propagation.
  Landscape Contractors AssociationExists to provide local resources to landscape professionals to help them maximize their business potentials.


 LandscapeHub is a new website for businesses to buy and sell landscape materials.  They are building, with approved buyers and quality suppliers like Manor View, an on-line marketplace.


 Maryland Nursery, Landscape & Greenhouse Association
An organization promoting the use of ornamental plants, products and services in Maryland.
 National Association of Landscape Professionals


 Pennsylvania Landscape Nursery Association

A non-profit professional trade organization which represents Pennsylvania’s ornamental horticulture industry.


  The United States National Arboretum
USDA Plant Hardiness Zone Map
  Maryland Cooperative Extension
Statewide, non-formal education system within the college of Agriculture and Natural Resources and the University of Maryland Eastern Shore.
 The Weather Channel