Guides - Perennial Plants
Here you will find links to a variety of websites with perennial plant gardening guides and information.
Gardening With Perennials
University of Illinois Extension Gardening with Perennials.
Lewis Gardens
"Beginner's guide to perennial gardening."
OSU Plantfacts
"Guides for answering plant-related questions from 46 different universities and government institutions across the US and Canada."
Perennial Resource
"Welcome to the source for inspiration and information on perennial gardening."
Perennials
"A terrific database of over 2000 perennials complete with images, featuring Heritage Perennials."
Perry's Perennial Pages
"Perennial and related horticultural information, serving the Green Mountain State of Vermont and the world."
Wikipedia Perennials
Free encyclopedia information about perennial plants.
