Viola adunca (Early Blue Viole Part sun main host p)

Early Blue Violet / Hookedspur Violet (Viola adunca) is a small, widespread Pacific Northwest native violet. And one of the single most ecologically important native plants we grow.

Viola adunca is the sole larval host plant for the federally threatened Oregon Silverspot Butterfly (Speyeria zerene hippolyta). The Silverspot's caterpillars can eat nothing else. USFWS recovery efforts on the Oregon coast. At Mount Hebo, Cascade Head, Rock Creek, and Bray Point. Center on restoring Viola adunca populations in coastal salt-spray meadows. Xerces Society research confirms V. adunca also hosts the Zerene Fritillary, Great Spangled Fritillary, Hydaspe Fritillary, and other Speyeria (greater fritillary) butterflies across its wide PNW range. Planting Viola adunca is one of the most tangible ways a home gardener can participate in fritillary-butterfly recovery.

Small blue-violet flowers with pale throats and characteristic hooked nectar spurs open in early to late spring above heart-shaped dark green leaves in low clumps. Two to six inches tall, spreads gently by rhizome and self-seeds into welcoming sites.

NAEB documents Indigenous use by the Blackfoot (pediatric and respiratory aid; blue dye from flowers), Carrier, Klallam, Makah, and Tolowa (analgesic, gastrointestinal aid, gynecological aid, eye medicine). A small plant with a long medicinal record across the PNW.

Not deer-resistant. Violet foliage is palatable to deer and rabbits; protect with caging in high-pressure sites, or plant in dense drifts so some plants survive to host caterpillars. Part shade to full sun (in coastal meadows, full sun; in forest edge, part shade). Moist to moderately dry soil. Year-round moisture in summer. Zone 4 to 9. Slow to establish but long-lived and self-sustaining in suitable sites.

Coastal-friendly. Native to Oregon coastal salt-spray meadows. Core Silverspot habitat.

Pairs with Fragaria chiloensis, Armeria maritima, Sidalcea hendersonii, Achillea millefolium, and Festuca rubra for an Oregon-coastal salt-spray meadow composition authentic to Silverspot recovery sites.