Sea Lettuce

Dudleya caespitosa

Dudleya_caespitosa_

Native Plants A-Z

Alaska Oniongrass (Melica subulata)

Baby Blue Eyes (Nemophila menziesii)

Black Sage (Salvia mellifera)

Blue Elderberry (Sambucus nigra ssp. caerulea)

Blue Eyed Grass (Sisyrinchium bellum)

Blue Wildrye (Elymus glaucus)

Blueblossom (Ceanothus thyrsiflorus)

Bush Monkey Flower (Diplacus aurantiacus)

Buttonbush (Cephalanthus occidentalis)

California Bee Plant (Scrophularia californica)

California Brome (Bromus carinatus)

California Buckwheat (Eriogonum fasciculatum)

California Coffeeberry (Frangula californica)

California Fescue (Festuca californica)

California Fuchsia (Epilobium canum)

California Hazel (Corylus cornuta californica)

California Hedge Nettle (Stachys bullata)

California Oatgrass (Danthonia californica)

California Phacelia (Phacelia californica)

California Pipevine / California Dutchman’s Pipe

California Poppy (Eschcholzia californica)

California Sagebrush (Artemisia californica)

California Wax Myrtle (Morella californica)

Clarkia (Clarkia unguiculat)

Coast Buckwheat (Eriogonum parvifolium)

Coastal Bush Lupine (Lupinus arborous)

Common Snowberry (Symphoricarpos albus)

Common Yarrow (Achillea millefolium)

Coyote Mint (Monardella villosa)

Crevice Alumroot (Heuchera micrantha)

Dense Sedge (Carex densa)

Douglas Iris (Iris douglasiana)

Evergreen Huckleberry (Vaccinium ovatum)

False Solomon’s Seal (Maianthemum stellatum)

Firecracker Brodiaea (Dichelostemma ida-maia)

Foothill Sedge (Carex tumulicola)

Fuchsiaflower Gooseberry (Ribes speciosum)

Giant Chain Fern (Woodwardia fimbriata)

Giant Wild Rye (Elymus condensatus)

Golden Currant (Ribes auraum)

Golden Yarrow (Eriophyllum confertiflorum)

Gum Plant (Grindelia hirsutula)

Hooker’s Evening Primrose (Oenothera elata ssp. hookeri)

Hummingbird Sage (Salvia spathacea)

Idaho Fescue (Festuca idahoensis)

Lady Fern (Athyrium filix-femina)

Leopard Lily (Lilium pardilinum)

Milkmaids (Cardamine californica, Dentaria californica)

Pacific Aster (Symphyotrichum chilense)

Pacific Hound’s Tongue (Cynoglossum grande)

Dudleya caespitosa (dúd-lee-a sess-pí-to-sa), also called Coast Dudleya or Sea Lettuce, is a striking succulent native to California’s coastal bluffs and rocky slopes. Though not native to the San Lorenzo Valley, it thrives in the valley’s hottest, sunniest gardens where few other natives can survive such dry, exposed conditions. In these settings, its clustered rosettes anchor shallow soils and provide an ecological foothold for pollinators and other insects in summer.

This species is a master of survival in harsh habitats.  Its powdery leaf coating acts as sunscreen, shielding it from scorching summer sun. In the SLV, this adaptation makes it a firewise and water-wise choice for dry slopes and rock gardens, where it can endure months without rain. During summer dormancy, rosettes shrivel and conserve moisture, then revive with winter rains — perfectly echoing the natural rhythm of the SLV’s wet and dry seasons.

From late spring into early summer, Coast Dudleya sends up branching stalks of bright yellow star-shaped flowers, an important nectar and pollen source for native bees, syrphid flies, butterflies, and hummingbirds.  Its rosettes and the crevices in which they grow may also shelter small invertebrates, adding microhabitat structure to rocky gardens.

In gardens, Dudleya caespitosa adds sculptural beauty and resilience. Its colonies can live for decades, slowly expanding into large mats of rosettes. Used on hot rock walls, dry slopes, or container plantings, it creates living architecture while supporting pollinators and stabilizing fragile soils. For SLV gardeners seeking low-water, high-impact natives, this coastal specialist offers a way to transform the valley’s hottest sites into habitat-rich, fire-wise landscapes.

Sea Lettuce

Dudleya caespitosa

KEY DETAILS

Plant Type

  • Perennial succulent

Light

  • Full sun to part shade

Soil

  • Requires well-drained, rocky, or sandy soils
  • Perfect for hot, dry garden sites where other natives struggle

 

Size

  • Individual rosettes 4–8 in tall and 6–12 in wide; colonies expand wider over time

Bloom Time

  • Late spring to early summer; May–July

Sun Exposures per day

Shade:  Less than 3 hours of direct sun

Part shade: 3-4 hours of direct sun

Part Sun: 5–6 hours of direct sun

Full Sun:  Receives 6+ hours of direct sun