Links
 | American Hort |
 | American Landscape Institute |
 | American Society of Landscape Architects
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 | Horticultural Research Institute
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 | 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.
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 | 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.
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 | Maryland Nursery, Landscape & Greenhouse Association An organization promoting the use of ornamental plants, products and services in Maryland. |
 | National Association of Landscape Professionals
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 | Pennsylvania Landscape Nursery Association A non-profit professional trade organization which represents Pennsylvania’s ornamental horticulture industry.
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 | 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 |