If it is a grass, you should pull it out, careful to disturb as little as possible the vegetable plant. We've never used herbicides or pesticides in the garden - please do not start without conversing with others.

Public Enemy #1 = Bermudagrass! You have to dig deep to get all the root because it spreads by rhisome. #2 Nutsedge Easy to pull but if you don't get that nut on the root, it will grow back. #3 Dallisgrass #4 Crabgrass and other invasive grasses. Sedges have edges; rushes are round; grasses are hollow right up from the ground. Another version of this poem is, Sedges have edges, rushes are round, grasses have nodes and willows abound.

Weed Management on Organic Farms - Center for Environmental Farming Systems

Weed Identification Guides - North Carolina State University