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Conservation commission continues public hearing on large Japanese knotweed removal at Greenough
Summary
The Carlisle Conservation Commission continued a public hearing on a 26,877 sq ft knotweed removal and restoration plan for Greenough Conservation Land at 812 Maple St., citing incomplete wetland delineation due to winter conditions. The town will refine maps and wetlands data before resuming the hearing on Feb. 26, 2026.
The Carlisle Conservation Commission on Jan. 22 continued a public hearing on a proposed ecological restoration plan to remove 26,877 square feet of invasive Japanese knotweed at Greenough Conservation Land (812 Maple Street).
Conservation Administrator Meghan Sullivan summarized the plan, which calls for targeted grazing by Clark Farm goats in May–June 2026, followed by herbicide applications in July–August and possible fabric smothering for three to five years. Sullivan said the removal area includes bordering vegetated wetlands, bordering land subject to flooding and riverfront area, and that the wetland delineation could not be confirmed because of snow cover.
Commissioners asked technical and ecological questions during the presentation. Chair George Shepard raised concerns about reinfestation from neighboring land across the town line; Jonathan DeKock of the Carlisle Conservation Foundation said that the adjacent Billerica parcel is CCF-owned and that CCF supports removal efforts on its land. Commissioner Brian Murphy asked about specific herbicides and monitoring plans; Commissioner Sylvia Willard volunteered to show staff known locations of the rare Britain’s violet on Greenough before treatments begin.
Because key details—including a verified wetland delineation—could not be confirmed at this meeting, the commission voted to continue the hearing to Feb. 26, 2026, to allow staff and consultants to complete surveys and refine the restoration and monitoring plans. The motion to continue was moved by Melissa Webster and seconded by Sylvia Willard, and carried by roll call vote.
