This list is intended to include all significant botanical gardens and arboretums in the U.S. state of California.
| Name | Image | Affiliation | City |
|---|
| Alta Vista Gardens | Vista |
| Arlington Garden | Pasadena |
| Balboa Park Gardens | San Diego |
| Ruth Bancroft Garden | Walnut Creek |
| Blake Garden | University of California, Berkeley | Kensington |
| Luther Burbank Home and Gardens | Santa Rosa |
| California State University Northridge Botanic Garden | California State University | Northridge |
| [https://clovisbotanicalgarden.org/ Clovis Botanical Garden] | [https://clovisbotanicalgarden.org/contact/ Clovis Botanical Garden] | Clovis |
| Chavez Ravine Arboretum | Los Angeles |
| Chico University Arboretum | California State University | Chico |
| Conejo Valley Botanical Garden | Thousand Oaks |
| Conservatory of Flowers | San Francisco |
| Descanso Gardens | La Cañada Flintridge |
| Dunsmuir Botanical Gardens | Dunsmuir |
| Eddy Arboretum | United States Forest Service | Placerville |
| Edgewood Botanic Garden | Mill Valley |
| Filoli | National Trust for Historic Preservation | Woodside |
| The Arboretum at Fresno State | California State University | Fresno |
| Fullerton Arboretum | California State University | Fullerton |
| Gardens at Heather Farm | Walnut Creek |
| Hakone Gardens | Saratoga |
| Harland Hand Memorial Garden | El Cerrito |
| Humboldt Botanical Gardens | Eureka |
| Huntington Botanical Gardens | San Marino |
| Japanese Friendship Garden | San Jose |
| The Japanese Garden | Van Nuys |
| Jensen Botanical Gardens | Carmichael |
| Labadie Arboretum | Merritt College | Oakland |
| Leaning Pine Arboretum | California Polytechnic State University | San Luis Obispo |
| Living Desert Zoo and Gardens | Palm Desert |
| Los Angeles County Arboretum and Botanic Garden | Los Angeles Arboretum Foundation
County of Los Angeles | Arcadia |
| Lotusland | Montecito |
| Manhattan Beach Botanical Garden | Manhattan Beach |
| Marin-Bolinas Botanical Gardens | Bolinas |
| Markham Regional Arboretum | Concord |
| Mildred E. Mathias Botanical Garden | University of California | Los Angeles |
| McConnell Arboretum and Gardens | Turtle Bay Exploration Park | Redding |
| William Joseph McInnes Botanic Garden and Campus Arboretum | Mills College | Oakland |
| Mendocino Coast Botanical Gardens | Fort Bragg |
| Earl Burns Miller Japanese Garden | California State University | Long Beach |
| Moorten Botanical Garden and Cactarium | Palm Springs |
| Palomar College Arboretum | Palomar College | San Marcos |
| Pikake Botanical Gardens | Valley Center |
| Quarryhill Botanical Garden | Glen Ellen |
| Ramirez Canyon Park | Malibu |
| Rancho Santa Ana Botanic Garden | Claremont |
| Regional Parks Botanic Garden | Tilden Regional Park | Berkeley |
| Virginia Robinson Gardens | Beverly Hills |
| John R. Rodman Arboretum | Pitzer College | Claremont |
| Rusch Botanical Gardens | Citrus Heights |
| San Diego Botanic Garden (formerly Quail Botanical Gardens) | Encinitas |
| San Francisco Botanical Garden (Strybing Arboretum) | San Francisco |
| San Jose Municipal Rose Garden | San Jose |
| San Luis Obispo Botanical Garden | San Luis Obispo |
| San Mateo Arboretum | San Mateo |
| Santa Barbara Botanic Garden | Santa Barbara |
| Sherman Library and Gardens | Corona Del Mar |
| South Coast Botanic Garden | Palos Verdes |
| Stanford University Arboretum (includes Arizona Cactus Garden) | Stanford University | Palo Alto |
| University Arboretum | California State University | Sacramento |
| University of California Botanical Garden | University of California, Berkeley | Oakland |
| University of California, Davis Arboretum | University of California | Davis |
| University of California, Irvine Arboretum | University of California | Irvine |
| University of California, Riverside, Botanic Gardens | University of California | Riverside |
| University of California, Santa Cruz, Arboretum | University of California | Santa Cruz |
| Villa Montalvo | Saratoga |
| Wrigley Botanical Gardens | Santa Catalina Island |
| M. Young Botanic Garden | Kerman |