International Plant Groups & Societies

Aroids

International Aroid Society

http://www.aroid.org/

Bromeliads

Bromeliad Society International

https://www.bsi.org/new/

Roses

Canadian Rose Society

http://canadianrosesociety.org/

Clematis

International Clematis Society

http://www.clematisinternational.com/

Cottage Gardens

Cottage Garden Society (UK)

http://thecottagegardensociety.org.uk/homepage

Geraniaceae

International Geraniaceae Group

https://www.geraniaceae-group.org/

Geraniums

International Geranium Society

http://www.internationalgeraniumsociety.com/

Hardy Plants

Hardy Plant Society (UK)

https://www.hardy-plant.org.uk/

Herbs

International Herb Association

https://iherb.org/

Hibiscus

International Hibiscus Society

http://internationalhibiscussociety.org/

Palms

International Palm Society

https://palms.org/

Waterlilies and Water Gardening

International Waterlily and Water Gardening Society

https://iwgs.org/

Magnolias

Magnolia Society International

https://www.magnoliasociety.org/