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Region profile

California Southern Coast

Southern California/Northern Baja Coastis a region where winter rainfall decreases from west to east, summer rainfall decreases from east to west, and is dominated by Aridisols and Entisols with hyperthermic soil temperatures and extremely aridic soil moisture regimes.

Zone

Prairie

Common Name

California Southern Coast

CEC Level III Code

11.1.4

CEC Level II Code

11.1 Mediterranean California

Overview

About This Region

The Southern California/Northern Baja California Coast ecoregion is characterized by a Mediterranean climate with mild, wet winters and hot, dry summers. This climatic pattern, along with hyperthermic soil temperatures and aridic soil moisture, creates challenging conditions for plant growth and, consequently, for pollinators. Urbanization and habitat fragmentation are significant stressors, reducing native host and nectar plants. Changes in rainfall patterns also impact flowering seasons. Conservation efforts are crucial to support the diverse insect and bird pollinators in this region.

Region facts

At a glance

AliasesCalifornia Southern Coast, Southern California/Northern Baja California Coast, Los Angeles Coast, Orange County Coast, San Diego Coast, SoCal Coast, Southern California Northern Baja California Coast, Southern CA Coast, SoCal coastal region
Geographic Range
This region is characterized by coastal plains, marine terraces, and low hills bordering the Pacific Ocean, encompassing major urban areas from Santa Barbara south to the Mexican border.
Climate SnapshotThe California Southern Coast region experiences a Mediterranean climate characterized by mild, wet winters and warm, dry summers.
Terrain ProfileThe Southern California region exhibits a vast elevation range from a minimum of -269 ft to a maximum of 13,868 ft, with coastal areas (South Coast) generally featuring a low average elevation around 43 ft.
Vegetation CoverThe vegetation of the California Southern Coast region 11.1.4 is characterized primarily by shrubland, chaparral, and coastal sage scrub.
Wildlife HabitatThe California Southern Coast (CEC Level III Region 11.1.4) presents harsh environments for plant growth due to extremely aridic soil moisture regimes, which influences the distribution and relative abundance of wildlife species in this coastal region.

Eco snapshot

What shapes this region

Climate pattern

  • Mediterranean pattern: wetter season and a pronounced dry season.
  • Ocean influence can moderate heat and extend bloom periods in some spots.
  • Microclimates (small local weather differences) can shift bloom timing even within the same neighborhood.

Vegetation profile

The vegetation of the California Southern Coast region 11.1.4 is characterized primarily by shrubland, chaparral, and coastal sage scrub.

Wildlife profile

The California Southern Coast (CEC Level III Region 11.1.4) presents harsh environments for plant growth due to extremely aridic soil moisture regimes, which influences the distribution and relative abundance of wildlife species in this coastal region.

Why pollinators matter here

  • Many native plants rely on insects for seed set and healthy populations.
  • Habitat fragmentation makes small, connected patches more valuable.
  • Long dry periods mean late-season flowers can be especially important.
  • Coastal landscaping choices can either support pollinators—or create “green deserts” with little food.

Seasonal timing

Planting seasons

Timing varies by microclimate; use this as a flexible guide.

Seasonal timing

  • Wet-season planting is often easiest for establishing natives (when soils are naturally moist).
  • Spring planting can work with regular watering while plants establish.
  • Summer planting is possible but usually requires more careful watering and heat/wind protection.
  • Fall is often a good time to plan, plant, and seed so roots develop before the driest stretch.

Quick seasonal checklist

  • Choose 3–5 native species with staggered bloom times.
  • Add at least one shrub and a few smaller flowering plants.
  • Mulch lightly (keep mulch away from plant crowns and bare-soil nesting spots).
  • Set up a simple watering plan for the first year (site-dependent).
  • Leave a small area of bare, well-drained soil for ground-nesting bees.

Yearly needs

Pollinator calendar

What pollinators need throughout the year, and what to do about it.

Late winter/early springEarly nectar/pollen to start new bee generationsPlant early bloomers; let a few native plants flower before trimming back
SpringLots of blooms and safe nesting sitesAim for “something blooming” every week; keep some bare soil and stems
SummerDrought-resilient flowers and shallow waterAdd summer-blooming natives; provide a small water dish with stones for landing
Late summer/fall“Bridge” blooms when many landscapes go quietPlant late bloomers; avoid deadheading everything at once so some flowers go to seed
Winter or Dry SeasonShelter from weather and disturbanceLeave leaf litter in corners; keep stems/seedheads until the next growth cycle

Keystone plants

Keystone plants by season

Mix early, mid, and late bloomers so pollinators always find food.

Early Bloom

  • California lilac (Ceanothus)
  • Manzanita
  • California poppy
  • Coastal buckwheat (early forms)

Mid-Season Bloom

  • California sagebrush
  • Black sage
  • White sage
  • Monkeyflower
  • Yarrow

Late-Season Bloom

  • California buckwheat
  • Goldenbush
  • Coyote brush
  • California fuchsia

Seed mix concept

A Billion Small Steps Seed mix

A simple way to plan is to think in three bloom “jobs,” so something is flowering through the year’s key windows (exact timing varies by microclimate).

Spring starter

Spring starter: early bloomers that help pollinators ramp up after cooler months.

Summer bridge

Summer bridge: drought-tolerant flowers that keep food available through dry stretches.

Fall finisher

Fall finisher: late-season bloomers (often shrubs) that carry pollinators when many gardens go quiet.

What You Can Do

Make a difference for native habitats.

Turn this knowledge into action. Whether you plant a single pot or a whole garden, you are building a vital bridge for local biodiversity.

Join the movement to restore our shared habitats.

Native plants

Plants that thrive in this region

Asters (*Symphyotrichum* spp.)

Asters

Asters are late-season wildflowers that bring a burst of daisy-like blooms when many gardens are winding down, making them a reliable choice for pollinator-friendly planting.

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Baccharis (*Baccharis* spp.)

Baccharis

Baccharis is a genus of tough, wildlife-friendly shrubs often used to add structure and long-season nectar to gardens and restoration plantings. If you have a sunny spot and want a low-fuss shrub that can support pollinators, Baccharis is worth a look.

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California lilac (*Ceanothus* spp.)

California lilac

California lilac (Ceanothus) is a flowering shrub known for clouds of blue blooms that can be a big draw for pollinators when it’s planted in the right spot.

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Clarkias

Clarkias are cheerful, easy-to-grow wildflowers in the genus Clarkia, known for silky, colorful blooms that can brighten beds, borders, and containers while offering nectar and pollen for visiting insects.

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Goldenrods (*Solidago* spp.)

Goldenrods

Goldenrods are tough, sunny wildflowers in the genus Solidago that light up late-season gardens with golden blooms and provide reliable nectar and pollen when many other flowers are fading.

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Manzanitas (West) (Arctostaphylos spp.)

Manzanitas

Manzanitas are tough, beautiful western shrubs with urn-shaped flowers that can feed early-season pollinators and evergreen leaves that keep gardens looking good year-round.

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Phacelias (*Phacelia* spp.)

Phacelias

Phacelias are easygoing wildflowers in the genus Phacelia, known for their nectar-rich blooms that can bring lots of pollinator activity to gardens, schoolyards, and even containers.

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Poppies (*Eschscholzia* spp.)

Poppies

Bright, cup-shaped poppy flowers from the genus Eschscholzia that thrive in sunny spots and can add easy, pollinator-friendly color to gardens, pots, and schoolyards.

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Sages (*Salvia* spp.)

Sages

Sages (genus Salvia) are aromatic, nectar-rich plants that can add long-lasting color and steady pollinator activity to gardens, balconies, and schoolyards.

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Wild bergamot & bee balms (*Monarda* spp.)

Wild bergamot & bee balms

Wild bergamot and other bee balms (the genus Monarda) are easygoing native wildflowers known for their shaggy, pom‑pom blooms that draw in lots of pollinators. They’re a great choice when you want long-lasting summer color and a plant that feels lively with buzzing visitors.

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Wild buckwheats (*Eriogonum* (genus))

Wild buckwheats

Wild buckwheats (genus Eriogonum) are tough, long-blooming western native wildflowers that can turn dry, sunny spots into reliable pollinator stops.

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Pollinators

Pollinators active in this region

Bee flies (Family Bombyliidae)

Bee flies

Adults visit flowers for nectar and can move pollen between blooms; their presence is a sign of diverse, functioning habitats.

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Brushfoots (Family Nymphalidae)

Brushfoots

Many brushfoots move pollen between flowers as they feed, and their caterpillars are part of healthy food webs.

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Bumble bees (Genus Bombus)

Bumble bees

Bumble bees are important pollinators of many wildflowers and garden plants, helping ecosystems and food crops reproduce.

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Flower flies / hoverflies

Adults visit flowers for nectar and pollen, and many species’ larvae help keep plant-eating pests in check.

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Hawk / sphinx moths (Family Sphingidae)

Hawk / sphinx moths

They can move pollen between flowers while feeding on nectar, especially for blooms that open or scent up in the evening.

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Leafcutter bees (Genus Megachile)

Leafcutter bees

They move pollen between flowers while foraging, helping many wild plants and garden plants set seed and fruit.

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Mason bees (Genus Osmia)

Mason bees

They move pollen between flowers while foraging, helping many wild plants and garden crops set seed and fruit.

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Mining bees (Genus Andrena)

Mining bees

They move pollen between flowers while foraging, helping many wild plants and garden plants set seed and fruit.

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Paper wasps (Genus Polistes)

Paper wasps

They can move pollen while drinking nectar, and they also help control many plant-eating insects.

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Silkmoths (giant moths) (Family Saturniidae)

Silkmoths (giant moths)

They’re part of healthy food webs and plant communities, and their caterpillars depend on a wide range of native trees and shrubs.

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Skippers (Family Hesperiidae)

Skippers

Skippers visit many flowers for nectar and can help move pollen between blooms while they feed.

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Small nectar moths (micro-moths) (Multiple families (varies))

Small nectar moths (micro-moths)

Many small moths move pollen while feeding on nectar, supporting wild plants and garden blooms—especially in the evening and at night.

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Soldier beetles (Family Cantharidae)

Soldier beetles

Many adults visit flowers and can move pollen between blooms, while also helping control some garden pests.

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Swallowtails (Family Papilionidae)

Swallowtails

Adult swallowtails visit many flowers for nectar and can help move pollen between blooms as they feed.

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Sweat bees (Family Halictidae)

Sweat bees

They help move pollen between flowers in gardens, parks, and natural areas, supporting seed and fruit production.

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Whites & sulphurs (Family Pieridae)

Whites & sulphurs

They visit a wide range of flowers for nectar and can help move pollen between blooms as they feed.

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