Start with high-confidence perennial flowers books, then narrow by subgenre or adjacent topics.
Private Gardens of Philadelphia
Nicole Juday, Rob Cardillo
The Complete Language of Flowers
S. Theresa Dietz
The Complete Guide to Saving Seeds
Robert E. Gough, Cheryl Moore-Gough
Rosemary Gladstar's Medicinal Herbs: a Beginner's Guide
Rosemary Gladstar
Flamingo Estate Pleasure Principles
Richard Christiansen
