bender board

noun

variants or benderboard

ˈben-dər-ˌbȯrd

plural bender boards or benderboards

: material manufactured in long, flexible strips for use especially as garden edging

The granite pathway winds through the garden to the tea house. It is lined with vinyl bender board to control the lawn on one side and medium river rock on the other to keep the bark and sand in place.—

Cecile Garrison, Visalia Times-Delta (California), 22 Apr. 2010

Landscape architect Bill Derringer of Atherton, California, used redwood benderboard—flexible wood strips usually used for lawn borders—for the top and bottom rails.—

Peter O. Whitely, Sunset, November 1995