Gum Plant

Grindelia hirsutula (grin·dēe·lee·uh her·soo·too·luh), commonly known as Gum Plant, is a hardy, drought-adapted native found on dry slopes, grasslands, and chaparral edges in the Santa Cruz Mountains and San Lorenzo Valley.

Known for its bright yellow, daisy-like flowers and sticky, resin-coated buds, this plant thrives in hot, exposed, and often disturbed habitats where many others fade.

Its toughness, drought tolerance, and ability to grow in poor soils make it highly adaptable to native gardens with full sun and minimal care.

The plant’s namesake gum-like resin helps protect the buds from sun scorch and desiccation, making the Gum Plant both eye-catching and ecologically important.

By protecting flower buds from heat damage and deterring herbivores, the resin helps ensure a steady nectar supply for late-season pollinators and promotes successful seed production for birds and other wildlife.

Its rugged traits make it a dependable addition to full-sun habitat gardens, especially in dry, erosion-prone areas. This species is a standout performer in late summer and early fall when nectar sources are scarce.

Blooming from July through October, it provides critical nectar for late-season pollinators, including sweat bees, hoverflies, checkered skippers, and wasps.

It also supports migrating Monarch butterflies, along with other insects and butterflies that remain active through the dry summer and early fall in the SLV.

Beyond supporting pollinators and seed-eating birds, Grindelia hirsutula habitats often host spiders, scorpions, and tarantulas that prey on insects, and sometimes small lizards, while western fence lizards and snakes such as gopher and ringneck snakes forage in these open slopes, creating a layered food web that enhances habitat diversity.