Tulip Glossary  
   Features a glossary, tulip care, and images.
   http://www.bulb.com/glossaries/tulip/

The Tulip Book of P. Cos  
   Online reproduction of a 1637 book about tulips.
   http://www.agralin.nl/tulips/

Tulip Insect Problems  
   Brief paragraph on tulip aphids and mites, from the Michigan State University Extension.
   http://www.msue.msu.edu/msue/imp/modop/00001485.html

The Gardening Articles , the Noble Tulip  
   Guidelines for designing tulip beds and some tips about specific tulips.
   http://wezel.com/garden/articles/tulips1.htm

Planting Spring-Flowering Bulbs  
   Features general and specific instructions to tulips.
   http://www.ces.ncsu.edu/teletip/scripts/5105.htm

Tulip Disease Problems  
   Brief article on blight, crown rot, stem rot, viruses and so forth; from Michigan State University Extension.
   http://www.msue.msu.edu/msue/imp/modop/00001486.html

Tulips and Daffodil Care After Bloom  
   From the University of Minnesota Horticulture Science Dept.
   http://www.extension.umn.edu/info-u/plants/BG455.html

Tulips - Moving  
   Concise but useful instructions on moving tulip bulbs for replanting.
   http://www.ag.uiuc.edu/~robsond/solutions/horticulture/docs/tulips.html

Perennials, Annuals and Bulbs - November Tips  
   Instructions on planting in the fall, including some specific intstructions about tulips. From the Virginia Coooperative Extension.
   http://www.ext.vt.edu/departments/envirohort/monthlytips/november/notenovh.html

Backyard Gardener Tulip Growing Information  
   Provides planting information for varieties of plants.
   http://www.backyardgardener.com/plants/tulip.html

Tesselaar Tulips Growing Guides and Planting Instructions  
   Growing guide and planting instructions for Tesselaar Tulips.
   http://www.tesselaar.net.au/growingguides/guide.asp?GuideID=164

Better Homes and Gardens:Tulip Flowers  
   You can't have spring without tulips! We offer tulip flowers that will bloom early, in the middle, and late in the season.
   http://www.bhg.com/home/Tulip-Flowers.html

MSN Learning & Research: Tulip  
   Encyclopedia article.
   http://encarta.msn.com/encnet/refpages/RefArticle.aspx?refid=761563910

Tulipes Sauvages  
   Dedicated to botanical tulips, this site provide cultural and botanical information and many photos that cover the range of species and varieties. English and French versions.
   http://www.tulipessauvages.org/