|American Landscape Institute
|American Society of Landscape Architects
|Horticultural 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