Sudden Oak Death Prevention · CA & OR
Is Sudden Oak Death near your trees?
Type your address. See your risk. Know exactly what to do this season. Free, no account — there is no cure once a tree is infected, but prevention works when the timing is right.
No exact address? Drop a pin on the map instead — it works just as well.
Property — Mill Valley, CAHeritage coast live oak near three bay laurels. Nearest lab-confirmed detection: 2.1 km NW.
SOD PreventionELEVATED risk. It's the dry season: thin bays within 15–30 m of valued oaks now, and book a licensed applicator for the October–December phosphonate window.
Detection map
Lab-confirmed and community-reported detections across CA & OR, colored by recency.
02 · CalendarSeasonal calendar
The fall treatment window, the no-prune months, survey season — timing is everything.
03 · MethodologyHow we score risk
Every label traceable to its data — including what the data can't tell you.