The following information was sent to me by Connie Vadheim.  I want to thank her for the following information... All towns mentioned are in Southern California.
          
Hi Gordon,

I'm assuming that your target audience includes folks who live at lower elevations in western Los Angeles & Orange Counties.   There are additional hummingbird plants that are native to coastal southern California and are available as seed or plants.   I teach a native plant gardening class at Madrona Marsh (Torrance) and always include at least one class each year devoted to bird (including hummingbird) and pollinator habitat plants.   I also actively garden for hummingbirds in my own garden (Redondo) and on the CSUDH campus.
              
I've attached my 'Hummingbird List' as well as a list of local seed and plant sources (referenced by number on the plant list).   Hope this will be useful information for your viewers - these plants will do better than some of the other western natives in our local area.
          
--Connie Vadheim, Prof. of Biology, CSU Dominguez Hills
     

Natural Landscapes
California native plant nursery and landscaping service.
Tony Baker.
Phone:   (310) 377-2536  
Website:    www.natural-landscapes.com/index.html  
E-mail:   baker@natural-landscapes.com  

Project Sound
Madrona Marsh Preserve / CSU Dominguez Hills.
Ask about availability of selected plant and seeds.
Tracy Drake.
Phone:   (310)  782-3989

El Nativo Growers, Inc.
200 S. Peckham Road
Azusa, CA. 91702
Phone:   626-969-8449
Website:   www.elnativogrowers.com

Greenlee Nursery
301 E. Franklin Avenue
Pomona, CA. 91766
Phone:   ( 909)   629-9045
Website:  www.greenleenursery.com

Larner Seeds
PO Box 407
Bolinas, CA. 94924
Phone:   (415)  868-9407
Fax:   (415)  868-2592
E-mail:  info@larnerseeds.com
Website:   www.larnerseeds.com

Las Pilitas Nursery
8331 Nelson Way
Escondido, CA. 92026
Phone:   (760)  749-5930 
Website:   www.laspilitas.com

The nursery is located in San Diego County about 
a half mile south of the I-15 off of Old 395.

Native Sons Wholesale Nursery  (Wholesale only)
379 W. El Campo Road
Arroyo Grande, CA. 93420
Phone:   (805)   481-5996
Website:   www.nativeson.com

Rancho Santa Ana Botanic Garden
1500 N. College Avenue
Claremont, CA. 93013
Phone:   (909)   625-8767

San Marcos Growers
PO Box 6827
Santa Barbara, CA. 93160-6827
Phone:   (805)  683-1561
Website:   www.smgrowers.com

S & S Seeds / Albright Seeds
P.O. Box 1275
Carpenteria, CA. 93013
Phone:   (805)  684-0436
Website:   www.ssseeds.com

Santa Barbara Botanic Garden
Garden Growers Nursery
1212 Mission Canyon Road
Santa Barbara, CA. 93105
Phone:   (805)  682-4726

Theodore Payne Foundation
10459 Tuxford Street
Sun Valley, CA. 91352
Phone:   (818) 768-1802
Website:   www.theodorepayne.org

Retail plants, mail order seed, large seed selection

Tree of Life Nursery
33201 Ortega Hwy.
P.O. Box 635
San Juan Capistrano, CA. 92693
Phone:   (949)  728-0685
Website:   www.treeoflifenursery.com

Wholesale & retail container plants, contract collect & grow.

Swallowtail Garden Seeds
122 Calistoga Road, # 178
Santa Rosa, CA. 95409
Phone: (707) 538-3585
Website: www.swallowtailgardenseeds.com/index.html

Stover Seed Co.
1415 E. 6th Street
Los Angeles, CA.
Phone:   (213)  626-9668
Toll Free:   (800)  621-0315
FAX (213) 626-4920
Website:    http://www.stoverseed.com

Anderson’s Seed Co.
20253 Elfin Forest Rd.
Escondido, CA. 92029
Phone:   (760)  471-1464
Fax:   (760)  471-6529
Website: http://www.seedcoseeds.com/index.html

Seed Hunt
P.O. Box 96
Freedom, CA. 95019-0096
Fax:   (831)  728-5131
E-mail:   seedhunt@cruzio.com 
Website:   www.seedhunt.com