Irises: How to Plant, Grow, and Care for Iris Flowers | The Old Farmer's Almanac
All about bearded irises and how to grow them | House & Garden
The Bearded Iris - Farragut Life
Irises on the East Rill Borders - Hestercombe
A Guide to Species Irises: Their Identification and Cultivation: Amazon.co.uk: The Species Group of the British Iris Society, The Species Group of the British Iris Society: 9780521206433: Books