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People shopping for plants


Arboretums & Botanical Gardens

Balboa Park - San Diego

Beverly Hills Cactus Garden

CSU Northridge Botanical Garden 

Descanso Gardens - La Canada Flintridge 

Earl Burns Miller Japanese Garden 

Huntington Gardens - San Marino 

Japanese Friendship Garden

Los Angeles Arboretum - Los Angeles 

Mildred E. Mathias Botanical Garden 

New Otani Hotel Garden

Rancho Santa Ana Botanic Garden – Claremont 

San Diego Botanical Garden – Encinitas 

San Dieguito River Park – Escondido 

Sherman Gardens - Corona del Mar 

South Coast Botanic Garden - Palos Verdes 

The Getty - Los Angeles 

Wrigley Memorial Garden 


Conversion Tables, Formulas and Suggested Uses for Horticulture

UGA Extension

Calculating Mulch

Landscape Calculators

Soil Texture Calculator

Fertilizer Calculator


Integrated Pest Management 

UC IPM   Statewide Integrated Pest Management Program




Irrigation Tutorials

Irrigation Garden Hose Flow Calculator



American Society of Agronomy

American Society of Landscape Architects 

American Society of Plant Biologist 

American Society for Horticulture Science

California Landscape Contactors Association

California Master Gardener Program

California Native Plant Society

Horticulture Therapy Institute 

International Society of Arboriculture

International Society of Arboriculture Western Chapter

Western Chapter International Society of Arborists



Plant Information

Arbor Day Tree ID

Berkeley Natural History Museums Consortium Jepson Herbaria

CalFlora, a botanical resource for California

California Native Plants ​

CalPhotos: Plants

Crop Nutrition

Flower Database

LA Arboretum Blog - Frank McDonough

National Plants Database

Native Plants

PlantFacts: Horticulture & Crop Science in Virtual Perspective

The Plant List


Plant Stress Key

Sunset Plant Index and Information

Trees of Stanford

Turf Identification Tool

Urban Forest Ecosystems Institute at Cal Poly

USASK - rare plants

Weed Science Society of America


WUCOLS (Water Use Classification Of Landscape Species)


Soil Information

Soil Information from the National Resources Conservation Service

Soil Science Society of America