Spotted Lanternfly inManchester, NHSPOTTED LANTERNFLY GUIDE
Manchester, New Hampshire — the state's largest city with a population of about 115,000 — entered active spotted lanternfly watch status in 2025 as the pest continued its northward push through New England. The former Amoskeag mill complex along the Merrimack River represents one of New England's largest brownfield areas, providing extensive Tree of Heaven habitat that could accelerate SLF establishment if the pest arrives. Residents should check vehicles arriving from southern New England, learn identification, and report any suspected sightings to the NH Department of Agriculture.
Where it's showing up
Key Neighborhoods
Highest activity zones
SLF Hotspots
Downtown Manchester
Active zone
Queen City
Active zone
North End
Active zone
Goffstown
Active zone
Hooksett border
Active zone
Primary SLF food source
Tree of Heaven in Manchester, NH
Merrimack River banks and the former Amoskeag mill complex — a massive post-industrial brownfield running through Manchester's urban core — support opportunistic Tree of Heaven colonization that would serve as prime SLF habitat. The I-293 corridor is the primary vehicle-based introduction pathway connecting Manchester to confirmed SLF populations in Massachusetts to the south.
Identify Tree of Heaven →Local action resources
What To Do in Manchester, NH
Report a Sighting
Every sighting in Manchester, NH maps the invasion front. Report directly to NH Dept 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 NH State Guide
County-level data, quarantine zones, treatment guides, and agency resources for the entire state.
See the full NH guide →Community intelligence
Live Sighting Map
See where SLF has been spotted near you in Manchester, NH. Add your own sighting to help map the front.
Open the Map →Free weekly fight briefing
Fight SLF in Manchester, NH.
One email per week. Your zip code. Your threat level. Your action plan. Know exactly what to do this week in Manchester, NH.