- All About Hydrangeas - Enthusiast shares photographs and information about classification, culture, propagation, and pruning.
- ColorChoice - A brand applied to cultivated varieties of flowering shrubs. Photos and descriptions of recent introductions, care information, and sources.
- Hydrangeum - Belgian Hydrangea society presents information about its collection and show garden, plant botany, and several illustrated articles. [Dutch/English]
- List of Shrubs for Problem Identification - Illustrated answers to problems with shrubs.
- Mountain Valley Growers: Laurus nobilis - Online source offers extensive information on cultivation, history, and characteristics of this shrub, with links to other resources.
- Pete's Hydrangeas - A place for hydrangea enthusiasts. Information about propagation, growing, drying, encouraging blossoms, and a forum.
- Spring Shrub Color - Descriptions of spring blooming shrubs organized by height. Links to summer, fall and winter shrubs.
- Trees and Shrubs - Articles dealing with various topics about trees and shrubs.
- Trees and Shrubs - Features FAQs answered by the North Dakota State University.
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