Professional

American Society of Landscape Architects
http://www.asla.org

The professional website for Licensed Landscape Architects

California Landscape Contractor's Association
http://www.clca.org

The professional website for Licensed Landscape Contractors.

Government

City of Los Angeles Urban Forestry Division
http://bss.lacity.org/urbanforestrydivision/index_planting.htm

This website is helpful in understanding what trees the City endorses and lists specific characteristics of each species along with photos for many of them.

Los Angeles County Arboretum and Botanical Garden
http://www.arboretum.org

I worked at the Arboretum for about 3 years in the mid-90’s as a Senior Gardener and was able to remodel the front entrance gardens including the area along Baldwin Avenue and the Parking Lot area. I enjoyed my time there and learned a great deal about hands on gardening and maintenance as well as hanging out with all the plant fanatics.

LA Department of Water and Power - Trees for a Green LA Program
http://www.ladwp.com/ladwp/cms/ladwp000744.jsp

Includes both workshops and free tree(s) for planting in LADWP's service area to promote shading and cooling of buildings and homes thus reducing energy consumption and of course making the world a better place.

Metropolitan Water District – Be Waterwise
www.bewaterwise.com/knowledge01.html

Many different local gardening resources and links.

Environmental

Tree People
http://www.treepeople.org

A non-profit organization that promotes environmental education in the schools, grassroots community tree planting and other larger regional environmental issues.

California Native Plant Society
http://www.cnps.org

The California Native Plant Society's webpage promotes the use of native plants.

Southern California Horticultural Society
http://www.socahort.org

A forum for the sharing of knowledge and experiences in gardening and botany in the Southern California region. They are a non-profit organization that meets on the second Thursday of each month at 7:30pm at Friendship Hall on Riverside Drive in the Los Feliz area with a different speaker on a variety of topics always with great slide shows and a Plant Raffle sponsored by a local nursery and a Plant Forum where people bring in their latest and greatest flowering and non-flowering plant cuttings for discussion.

The Gardening Launch Pad
http://gardeninglaunchpad.com

A general gardening resource site.

Nurseries

Theodore Payne Foundation
www.theodorepayne.org

A local native plant nursery and resource in the San Fernando Valley; the first to advocate native plants.

Greenwood Daylily Gardens
http://www.greenwoodgarden.com

A grower of daylilies and irises of all kinds in Southern California.

San Marcos Growers
www.smgrowers.com

A large wholesale nursery in Santa Barbara that grows many interesting and unusual perennials; great photo library.

Australian Native Plant Nursery
http://www.australianplants.com

A nursery in Ventura County that specializes in Australian plants and has a great photo library of the plants they feature.

Las Pilitas Nursery
http://www.laspilitas.com

This nursery's from up around San Luis Obispo has a web page with lots of info for native plants lovers and great photos too.