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Heavy Infestation β€” Confirmed 2022

Spotted Lanternfly inRockville, MDSPOTTED LANTERNFLY GUIDE

Confirmed
2022
Population Served
68,000
Status
Heavy Infestation

Montgomery County seat Rockville confirmed SLF in 2022 and is now heavily infested. The I-270 tech corridor and Metro Red Line are primary spread vectors, while Rock Creek Park's adjacent tree corridors provide dense Tree of Heaven habitat through the urban core. Proximity to the USDA Beltsville Agricultural Research Center adds federal research significance to local SLF monitoring. MD statewide quarantine in effect as of March 2026.

Where it's showing up

Key Neighborhoods

Rockville Town Square areaRock Creek Park adjacent neighborhoodsI-270 tech corridorMetro Red Line station areasUSDA Beltsville campus proximity zone

Highest activity zones

SLF Hotspots

1

Rock Creek Park margins through Rockville

Active zone

2

I-270 corridor tech campus zones

Active zone

3

Rockville Metro Red Line station area

Active zone

4

Croydon Creek Nature Center

Active zone

5

USDA Beltsville proximity corridor along US-1

Active zone

Primary SLF food source

Tree of Heaven in Rockville, MD

Rock Creek Park's margins through Rockville harbor extensive Tree of Heaven populations that support large SLF colonies spreading through Montgomery County's urban core. The I-270 tech corridor's highway margins and park-and-ride commuter lots concentrate vehicle traffic that moves SLF egg masses across the county. Metro Red Line stations are documented SLF spread nodes connecting Rockville populations directly to DC and the broader metro infestation zone.

Identify Tree of Heaven β†’

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 Rockville, MD

Report a Sighting

Every sighting in Rockville, MD maps the invasion front. Report directly to Maryland MDA.

Report Now β†’

Squish on Sight

See a spotted lanternfly? Kill it immediately β€” it is legal and encouraged in all states. Learn the best kill methods.

Full Fight Guide β†’

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 β†’

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 β†’

Community intelligence

Live Sighting Map

See where SLF has been spotted near you in Rockville, MD. Add your own sighting to help map the front.

Open the Map β†’

Free weekly fight briefing

Fight SLF in Rockville, MD.

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