"Rain Gardens: Absorb Water, Reduce Run Off, Prevent Flooding" by NRCS

"How to Start a Butterfly Garden" by NABA

"Going Native in Your Urban Garden" by By Colleen Beaty

USDA Plant Database 

The National Wildlife Federation Certification

"8 Ways to Use Edibles as Ornamentals" by Sunset 

The University of the District of Columbia’s Environmental Quality Testing Laboratory

"Finding a Better Way" by Lois Hoffman

"PEST-RESISTANT PLANTS AND FLOWERS" by Doreen Howard 

"Bed edges pull landscaping together" by ACES

"Find your U.S. Sunset climate zone" by Sunset