Field Bindweed is a low, twining perennial vine in the morning glory family — small, funnel-shaped white-to-pink flowers open along trailing or climbing stems from early summer through fall, wrapping around anything upright it touches, including desirable garden plants, fences, and crop stems. It's easy to mistake for its showier relative, hedge bindweed (Calystegia sepium), but field bindweed has smaller flowers and more arrow-shaped leaves with pointed basal lobes.
What makes it one of the most persistent weeds in North America is underground: roots that can run 6 to 20 feet deep and spread laterally through an extensive rhizome network, with a root fragment as small as two inches able to regrow into a full new plant. That means tilling or hoeing alone usually makes an infestation worse by chopping the roots into new starts, and hand-pulling only slows top growth without touching the system underneath. The seed is just as stubborn, staying viable in the soil for decades.
The most effective control combines persistence with timing: apply a systemic herbicide to actively growing vines while they're in flower, when the plant is pulling sugars down into the roots, and repeat for at least two or three seasons. Smothering a bed under heavy-duty landscape fabric or cardboard and mulch for a full growing season starves the roots without herbicide, though it takes patience to see it through.