What’s included

Sources for nearly 80,00 plants currently cultivated in North America are accessible on this site. Holdings for approximately 1,000 nursery firms have been completely listed to develop this sources section. It currently takes a three-year cycle to update our entire listing of nursery holdings. For each plant, the information given includes the names of the nursery firms that ship that plant (or seeds) as well as each firm’s address, telephone and fax numbers, e-mail and web addresses, and whether it is a retail or wholesale firm. Direct links to their web sites and online catalogs are given, when available.

To be included in our site, listings should indicate botanical names and the firm must ship their materials (it is frustrating not to be able to purchase plants). We have selected catalogs to ensure good geographic distribution—as many states and provinces of the US and Canada are represented as possible.

Wholesale firms

It is important that users respect the nature of wholesale firms. Those not qualified to purchase wholesale can ask a local nursery, landscape contractor or gardener to order wholesale plants for them.

Plant names

As some plants cannot be distinguished from their close relatives by scientific name, they have been assigned an additional key letter to follow the genus and/or species. For example, broccoli is listed as Brassica oleracea (b), cauliflower as Brassica oleracea (f); green beans are listed as Phaseolus (g) and yellow beans as Phaseolus (y), etc. Search by common name to find the key letters to use.

Names of some closely related varieties have been combined when they are part of a named series or range. For example, Petunia‘Pink Cascade’ and Petunia ‘White Cascade’ will both be found under Petunia ‘Cascade Hybrids.’ For more information on plant names, try the following sites:

Botanary section of Dave's Garden

Dictionary of Botanical Epithets

International Code of Botanical Nomenclature

The Naming of Plants (Royal Horticultural Society)

Plant Names: A Basic Introduction (Australia’s Virtual Herbarium)


The Plant and Seed Sources section has appeared in print since 1987 as Andersen Horticultural Library’s source list of plants and seeds, compiled and edited by Richard T. Isaacson, then head of the Library. Entries from the 4th edition (1996) were moved to Plant Information Online when it became operational in 1998. Two subsequent print editions were published in 2000 and 2004 from the online data, which is continually updated and contains the most current information.