Helpful Books:

Annuals and Tender Plants for North American Gardens by Wayne Winterrowd

Flowers Are Almost Forever: The Care and Handling of Cut Flowers by Libbey Oliver

Park’s Success with Seeds by Ann Reilly

Specialty Cut Flowers (second edition) by Allan M. Armitage and Judy M. Laushman

Seed Sources:

Burpee one of the oldest seed companies offers a wide selection of seeds and plants.

Johnny’s Selected Seeds has a good selection of seeds, including hard-to-find bouquet fillers.

Renee’s Garden Seeds has more poppies than Dorothy and her friends outside of Oz.

Select Seeds offers both seeds and plants of unusual and heirloom flowers

Swallowtail Garden one of the best selections of Calendulas and Zinnias