All About Hydrangeas
   Enthusiast shares photographs and information about classification, culture, propagation, and pruning.
   http://www.hydrangeashydrangeas.com/

ColorChoice
   A brand applied to cultivated varieties of flowering shrubs. Photos and descriptions of recent introductions, care information, and sources.
   http://www.colorchoiceplants.com/

Hydrangeum
   Belgian Hydrangea society presents information about its collection and show garden, plant botany, and several illustrated articles. [Dutch/English]
   http://www.hydrangeum.be/

List of Shrubs for Problem Identification
   Illustrated answers to problems with shrubs.
   http://web1.msue.msu.edu/msue/imp/shrulist.html

Mountain Valley Growers: Laurus nobilis
   Online source offers extensive information on cultivation, history, and characteristics of this shrub, with links to other resources.
   http://www.mountainvalleygrowers.com/launobilis.htm

Pete's Hydrangeas
   A place for hydrangea enthusiasts. Information about propagation, growing, drying, encouraging blossoms, and a forum.
   http://www.conweb.com/hydrangea/

Spring Shrub Color
   Descriptions of spring blooming shrubs organized by height. Links to summer, fall and winter shrubs.
   http://www.rodsgarden.50megs.com/shrspring.htm

Trees and Shrubs
   Articles dealing with various topics about trees and shrubs.
   http://gardenline.usask.ca/trees/index.html