Promotes and encourages scientific research and education in horticulture within the United States and throughout the world. Publisher of HortScience, HortTechnology, and the Journal of ASHS.

Encouraging the commercialisation of potential new crops (including herbs, spices, and other horticultural crops) in Australia. Includes newsletter and links.

Describes current research and grants for specialty crops in Colorado with emphasis on organic, small farm, and sustainable agriculture research.

Non-profit group providing research grants and scholarships for the bedding plant and cut flower industries. Includes history, requirements and applications, past recipients.

Online horticultural information service. Australia.

The HDRA researches and promotes organic gardening in the UK.

Gives the history of HORTAX, an association of taxonomists and horticulturists interested in the classification and nomenclature of cultivated plants, member information and links to the archives of HORTAX News.

Information about the horticultural technology with links to the Journal of Applied Horticulture, and horticultural societies.

German research institute based at Hanover University. Site in German and English.

The Institute carries out basic and applied research supporting the sustainable production of vegetable and ornamental plants and the rational use of natural resources.

A non-profit organization dedicated to sharing knowledge, conducting research, and promoting conservation of geophytic plants, most usually known as "bulbs".

Includes general and specific scientific information, links to journals, events calendar.

Provides information, resources and web links for over 200 plant oils and other plant extracts.

Information on quality gardening and landscaping practice, especially with regard to pruning of shrubs and trees.

Searchable database of ornamental and fruit crops, offering photos and characteristics of a large number of plants traded in the Netherlands. English/Dutch/German.