Spotted Lanternfly inFrederick, MDSPOTTED LANTERNFLY GUIDE
Frederick confirmed SLF in 2022. Situated at the I-70/I-270 interchange — the gateway to western Maryland — and adjacent to the Monocacy River, Frederick is a key spread corridor connecting the DC metro infestation zone to the western part of the state. Fort Detrick biological research campus and the historic downtown district are both under active monitoring. MD statewide quarantine in effect as of March 2026.
Where it's showing up
Key Neighborhoods
Highest activity zones
SLF Hotspots
Downtown Frederick historic district
Active zone
I-70/I-270 interchange corridor
Active zone
Monocacy River waterfront
Active zone
Fort Detrick biological research campus perimeter
Active zone
CSX rail lines through Frederick County
Active zone
Primary SLF food source
Tree of Heaven in Frederick, MD
Tree of Heaven is well established along Frederick's Monocacy River corridor, I-70/I-270 interchange margins, and CSX rail lines — the primary SLF spread vectors into western Maryland. The historic district's disturbed urban lots and creek corridors add additional habitat through the city's core. Frederick County Agricultural Extension is actively engaged in monitoring and public outreach.
Identify Tree of Heaven →Active Quarantine Alert
Maryland is under a statewide spotted lanternfly quarantine as of March 2026. Moving plants, yard waste, or outdoor furniture out of Maryland may require inspection.
Local action resources
What To Do in Frederick, MD
Report a Sighting
Every sighting in Frederick, MD maps the invasion front. Report directly to Maryland MDA.
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 Maryland State Guide
County-level data, quarantine zones, treatment guides, and agency resources for the entire state.
See the full Maryland guide →Community intelligence
Live Sighting Map
See where SLF has been spotted near you in Frederick, MD. Add your own sighting to help map the front.
Open the Map →Free weekly fight briefing
Fight SLF in Frederick, MD.
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