Bindweed (Convolvulus arvensis L.) can be quite difficult to get rid of. The root of the problem is its underground rhizome system. Rhizomes are underground stems capable of producing perennial growth and regenerating from even small pieces. These rhizomes allow bindweed to come back season after season. When mowed down, its rhizomes produce new growth. If all of its roots are not removed when it is dug out, they will regenerate to form new bindweed plants. To rid bindweed from your lawn for good, you must kill its rhizomes while it is actively growing.
Spray the bindweed with a non-selective glyphosate-based herbicide according to the manufacturer's instructions. To be effective, this herbicide must be applied in June or July when the plant has buds or flowers.
Spray bindweed again in late summer (August or early September) when any remaining plants have begun to bloom.
Remove any dead foliage in two weeks. Reseed the area with grass seed (choose a shade-tolerant variety of grass seed for shady areas). Sprinkle the seed over the bare patch. Then walk over the seeded area to ensure that the seed has good contact with the soil. Water the patch and keep the top 2 inches of the soil moist until two weeks after the grass seed has germinated.
Monitor any previously-infested areas and spray or dig out any small bindweed seedlings as soon as you spot them.