A collection of short notes on a number of horticultural topics.

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".

Information on the distinct authorities, how to chose and register a name, symposia and calendars.

Information on the cultivation of Lepidium meyenii, or Maca.

Teaching, research, and outreach in horticulture, including basic biology, ecology, production and use of horticultural products.

Carries out a wide range of efficacy and residue work on horticultural crops throughout the North Island of New Zealand, and offer off-season research for Northern Hemisphere companies.

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.

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.

Conducts research, teaching, and public service on the selection, management and role of plants and ecosystems in the urban environment. At College of Forest Resources, University of Washington, Seattle.

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.

AgNIC guide to web resources. Includes information on cultivation, marketing, harvest, nutrition, recipes, and trade associations