Growing Dahlias
http://www.extension.umn.edu/distribution/horticulture/DG1115.html

Antique Bulbs
http://www.lib.niu.edu/ipo/1998/ic981016.html

American Iris Society
Growing information, photos, 100 most popular irises and other iris links.
http://www.irises.org

Growing Iris
http://ohioline.osu.edu/hyg-fact/1000/1240.html

The World Wide Dahlia Society
Links to dahlia societies, growing tips and suppliers.
http://www.dahlia.org

Growing Dahlias
Propagation, culture, diseases and insects of dahlias.
http://www.ianr.unl.edu/pubs/horticulture/g189.htm

Summer Flowering Bulbs
Summer flowering bulbs can add beauty to your home landscape.
http://www.ag.ohio-state.edu/~ohioline/hyg-fact/1000/1244.html

North American Lily Society
Learn all about lilies.
http://www.lilies.org

Selecting Lilies for Your Garden
Lily culture and selection
http://www.extension.umn.edu/distribution/horticulture/DG1112.html

Tuberous Rooted Begonias
Grow these begonias in shaded areas.
http://ndsuext.nodak.edu/extnews/askext/indoor/224.htm

Storing Tender Bulbs and Bulblike Structures
http://www.extension.umn.edu/distribution/horticulture/DG1117.html

American Daffodil Society
Listing of local daffodil societies; cultivars, bulb sources and frequently asked questions.
http://www.daffodilusa.org/