🌿 California Bay Laurel

How to Identify California Bay Laurel

California bay laurel is one of the most aromatic trees on the Peninsula. Crush a leaf and the intense camphor-eucalyptus scent is unmistakable — far more potent than culinary bay leaves.

• Leathery, lance-shaped leaves 3–5 inches long — dark green, glossy above, paler below
• Powerful aromatic scent when leaves are crushed — headache-inducingly strong (nicknamed "headache tree")
• Multi-stemmed growth habit — often grows as a large shrub or multi-trunk tree in forest understory
• Smooth gray bark on young trees, becoming scaly and fissured with age
• Small yellowish flowers in winter/early spring; olive-like green-purple fruit in fall

Where It Grows on the Peninsula

Bay laurel is ubiquitous in Peninsula woodlands, growing in mixed oak-bay-redwood forests from sea level to 2,000+ feet. It thrives in canyons, north-facing slopes, and areas with year-round soil moisture. Common throughout Woodside, Portola Valley, and the forested hillsides behind virtually every Peninsula city. In developed areas, bay laurels often grow at the edges of lots where maintained landscapes meet native woodland.

The Sudden Oak Death Connection

This is the most important thing to know about bay laurel on the Peninsula.

California bay laurel is the primary foliar host for Phytophthora ramorum , the pathogen that causes Sudden Oak Death (SOD). The disease doesn't kill bay laurels — it merely causes leaf tip browning. But infected bay laurels produce massive quantities of spores during wet weather that then infect and kill nearby coast live oaks and tanoaks.

Research from UC Berkeley's Matteo Garbelotto lab has shown that removing bay laurel trees within 10 meters (33 feet) of coast live oaks significantly reduces SOD infection rates. This creates a genuine management dilemma: both species are native and often both are protected by city ordinances, but leaving bay laurels near oaks can effectively be a death sentence for the oaks.

If you have both bay laurels and coast live oaks on your property, consult an arborist about a SOD management plan. Some cities (Woodside, Atherton) have provisions for removing bay laurels to protect heritage oaks.

Protection Status by City

Use our Permit Checker for your specific situation.

Common Issues & Diseases

Sudden Oak Death (as carrier)

Bay laurel itself tolerates P. ramorum infection with minimal damage — just leaf tip browning. But every infected leaf produces spores. Monitor bay laurels near oaks for the telltale dark leaf-tip lesions, especially during spring rains. Free SOD testing is available through UC Berkeley's SOD Blitz program.

Root Suckering

Bay laurels sprout aggressively from roots and stumps. Removing a bay laurel often results in dozens of sprouts emerging from the root system. Complete eradication requires either repeated cutting or stump treatment.

Structural Failure

Multi-stemmed bay laurels are prone to splitting apart at the base, especially when weighted by rain or wind. Co-dominant stems with included bark are the primary structural concern.

Peninsula Care Calendar

Detailed Notes

Fire Risk

Moderate — the aromatic oils in bay laurel leaves are flammable. However, the dense evergreen canopy and moist understory conditions somewhat offset this risk in typical Peninsula woodlands.

Drought Tolerance

Very good — bay laurels are well-adapted to California's dry summers. Mature trees need no supplemental irrigation.

Wildlife Value

Moderate. Fruit is eaten by birds and small mammals. Dense canopy provides nesting habitat. However, the strong aromatic compounds deter many insects, so bay laurels support fewer invertebrates than oaks.

Arborist Pro Tips

Written by Michael Schuck, ISA Certified Arborist WE-15750A · Updated February 2026
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