Native Plants A-Z
Phacelia californica (fa-sée-lee-uh ka-li-fór-ni-ka), commonly known as Rock Phacelia, is a tough, visually striking perennial native to coastal and foothill slopes of northern and central California, including the Santa Cruz Mountains. Adapted to rocky soils, coastal scrub, and chaparral edges, this species offers season-long habitat value and a coiled floral form that stands out in native gardens and wildlands. Each plant produces dense clumps of hairy, lobed leaves and flowering stems topped with tightly curled inflorescences, often described as scorpion-like in appearance. This unique coiling gives rise to the nickname “California Scorpionweed.” Although showy, these fine glandular hairs can cause mild contact dermatitis in sensitive individuals; therefore, gloves are recommended during planting or maintenance.
Blooming from late spring into summer, Rock Phacelia is a magnet for native bees, syrphid flies, butterflies such as the Painted Lady (Vanessa cardui), predatory wasps, and Yellow-faced Bumble Bees (Bombus vosnesenskii). It plays a vital role as a nectar source for butterflies and other insects active during the dry months of summer and early fall.
Ecologically, Phacelia californica thrives in disturbed areas. It often colonizes road cuts, rocky slopes, and erosion-prone sites, forming basal rosettes that die back in winter and resprout each year from the same root system. Its roots help stabilize loose or erosion-prone soils. Once established, it requires little to no summer water, making it a valuable addition to dry, exposed restoration zones or pollinator gardens.
When planted with other dry-adapted natives, such as California Buckwheat (Eriogonum fasciculatum), Coyote Mint (Monardella villosa), Common Madia (Madia elegans), and Purple Needlegrass (Stipa pulchra), Rock Phacelia enhances biodiversity, reinforces soil health, and supports wildlife throughout the seasons.
California Phacelia
Rock Phacelia
Phacelia californica
KEY DETAILS
Plant Type
Perennial herbaceous wildflower; forms a multi-year basal rosette
Light
- Full sun
- Performs best in open, exposed conditions with strong light
Soil
- Tolerates rocky, sandy, or nutrient-poor soils
- Thrives in well-drained conditions and erosion-prone areas
Size
- Height: 1–2 feet
- Spread: 1–3 feet
Bloom Time
- Late spring through summer (May-August)
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