Indigofera pseudotinctoria

Links of Interest to Gardeners

Many Horticultural Organizations, Societies and Public Gardens offer a rich array of programs, including trips, garden tours, plant sales, workshops and book clubs. Click here for a list of upcoming events.

The links below are provided for your interest and convenience. Our Member organizations are highlighted in green. Check out their websites!

Horticultural Organizations

Public Gardens

Other Hardy Plant Society Groups

Educational Sites

HPS/MAG Links Policy


Horticultural Organizations

American Boxwood Society

American Conifer Society

American Hemerocallis Society

American Hosta Society

American Iris Society

American Peony Society

Bard College

Delaware Center for Horticulture

Delaware Valley Hosta Society

Delaware Valley Water Garden Society

Elwyn Greenhouse

Garden Writers Association

The Garden Conservancy

The Herb Society of America PA Heartland Unit

The Herb Society of America Philadelphia Unit 

Horticultural Society of Maryland

International Lilac Society

Magnolia Society

North American Rock Garden Society

Northeast Heather Society

Penn State Master Gardeners

Pennsylvania Horticultural Society

The Society for Siberian Irises

The Virginia Horticultural Foundation

Wissahickon Valley Watershed Association


Public Gardens 

Awbury Arboretum

Andalusia Foundation

Berkshire Botanical Garden

Brandywine Conservancy


Green Spring Gardens

Greenwood Gardens

Haverford College Arboretum

The Henry Foundation for Botanical Research

Huntsville Botanical Garden

Jenkins Arboretum & Gardens

Longwood Gardens, Inc.

Morris Arboretum

Mt. Cuba Center

The National Botanic Garden

Natural Lands Trust

Nature Conservancy

Nemours Mansion and Gardens

Norfolk Botanical Garden

PHS Meadowbrook Farm

The Scott Arboretum of Swarthmore College

Stonecrop Gardens

Tyler Arboretum

University of Delaware Botanic Gardens

US Botanic Garden

US National Arboretum

Wave Hill, Inc.


Winterthur Museum, Garden & Library


Other Hardy Plant Society Groups


Hardy Plant Group Willamette Valley

Hardy Plant Society Connecticut

Hardy Plant Society Michigan

Hardy Plant Society Oregon

Hardy Plant Society Salem

Hardy Plant Society Wisconsin


Educational Sites


Beans Trees and Shrubs

Hosta Library

National Gardening Association Plant Care Guides

Penn State Extension

USDA Plants Database

The Wagner Free Institute of Science



HPS/MAG Policy on Links

The Hardy Plant Society/Mid-Atlantic Group has editorial control over which links are included on this website.  Links that may be included on the webpage are sites of non-profit, horticulture-related organizations, such as societies, botanical gardens, and educational institutions. HPS/MAG Members are invited to share links that are consistent with HPS/MAG's policy on links by emailing them to [email protected]