Santa Rosa Horkelia
Horkelia tenuiloba
Care
1–1ft tall
Friendly
Prized
Coastal scrub and grasslands of Sonoma County (Santa Rosa area), below 1000 ft elevation
Care Guide
Planting
Plant Santa Rosa horkelia in a location that mimics its native chaparral habitat in the coastal hills north of the San Francisco Bay Area. This low-growing mat-former (reaching about 1 foot tall) works well as a groundcover and should be spaced accordingly. While specific sun and soil requirements aren't detailed in available data, choose a spot where you can observe the plant's performance in your garden microclimate.
After Planting
After planting, monitor your horkelia through its first growing season and adjust watering based on how it responds - chaparral natives are typically drought-tolerant once established, but young plants need time to develop their woody base. This is a perennial that supports local wildlife including several butterfly and moth species, so avoid heavy pruning that would damage the plant's structure. The #1 mistake is overwatering; remember this plant evolved in dry, well-drained hillside conditions, so err on the side of less water rather than more.
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Endangered & Threatened Species Supported
Multiple subspecies with varying threats
Listed under California ESA
Wildlife Supported
Insects
primary larval host plant for copper butterfly development
larval host plant for skipper butterfly caterpillars in spring emergence
spring forage plant for early season pollen and nectar
early spring nectar source for colony establishment and queen provisioning