Northern California Daffodil Society  
   Daffodil information including FAQs, growing tips, "naturalizing", support and services, show and event calendars.
   http://www.daffodil.org/

Narcissus - Daffodil  
   Brief planting instructions from Michigan State University Extension.
   http://www.msue.msu.edu/msue/imp/mod03/01700627.html

Viruses and Daffodils  
   Article describing how a virus displays on daffodils and tips on controlling viral diseases; from Devonian Botanic Garden, University of Alberta (Canada).
   http://discoveredmonton.com/devonian/getgro104.html

Better Homes and Gardens:Narcissus Flowers  
   Also called daffodils, our Narcissus are the trumpets of spring! You can plant these Narcissus flowers in groups to provide a great set of beautiful flowers.
   http://www.bhg.com/home/Narcissus-Flowers.html

National Daffodil Show  
   Photos and schedule for show sponsored by the American Daffodil Society.
   http://users.erols.com/dlpub/adsnational.html