Spotted Lanternfly inPhiladelphia, PASPOTTED LANTERNFLY GUIDE
Philadelphia is ground zero for SLF's eastward spread — confirmed since 2018, it is one of the most heavily infested cities in the US. Fairmount Park's 2,000 acres of mixed hardwoods are heavily affected, Wissahickon Valley Park is loaded with Tree of Heaven, and the urban heat island extends the adult season 2–3 weeks longer than surrounding areas.
Where it's showing up
Key Neighborhoods
Highest activity zones
SLF Hotspots
Wissahickon Valley Park
Active zone
Cobbs Creek Park
Active zone
Navy Yard waterfront
Active zone
Kensington neighborhood
Active zone
SEPTA rail corridors
Active zone
Primary SLF food source
Tree of Heaven in Philadelphia, PA
Philadelphia's SEPTA rail corridors, Wissahickon Valley, Cobbs Creek, and vacant lots throughout Kensington and North Philly have massive Tree of Heaven populations feeding SLF. PA remains the epicenter of the US infestation — no quarantine needed here because establishment is total and statewide.
Identify Tree of Heaven →Local action resources
What To Do in Philadelphia, PA
Report a Sighting
Every sighting in Philadelphia, PA maps the invasion front. Report directly to PA Department of Agriculture.
Report Now →Squish on Sight
See a spotted lanternfly? Kill it immediately — it is legal and encouraged in all states. Learn the best kill methods.
Full Fight Guide →Map ToH in Your Block
Tree of Heaven removal cuts off SLF food supply. Add ToH sightings to the community map to guide removal efforts.
View Sighting Map →Statewide resources
Full PA State Guide
County-level data, quarantine zones, treatment guides, and agency resources for the entire state.
See the full PA guide →Community intelligence
Live Sighting Map
See where SLF has been spotted near you in Philadelphia, PA. Add your own sighting to help map the front.
Open the Map →Free weekly fight briefing
Fight SLF in Philadelphia, PA.
One email per week. Your zip code. Your threat level. Your action plan. Know exactly what to do this week in Philadelphia, PA.