General native gardening

Bloom! California
California Invasive Plant Council
California Native Plant Society
California Native Plant Society: San Diego Chapter
Calflora
Calscape
Home Grown National Park
Master Gardener Association of San Diego County
Theodore Payne Foundation for Wild Flowers and Native Plants

Gardening for wildlife

National Wildlife Federation: Certified Wildlife Habitats
Resource Conservation District of Greater San Diego County: Pollinator Health
Tree of Life Nursery: Natives for Butterflies
University of California: Integrated Pest Management
Xerces Society: Pollinator-Friendly Plant Lists

Water-wise gardening

San Diego County Water Authority: WaterSmart Landscaping
Save Our Water
Water Use it Wisely
Water Conservation Garden

Where to get your native plants

San Diego
San Diego Audubon Society: Native Seed Libraries
City Farmers Market
Mission Hills Nursery
Moosa Creek Nursery
Native West Nursery

El Cajon
Cuyamaca College OH Plant Nursery

Escondido
El Planito Nursery and Landscaping
Native Grown Nursery