In the home garden, successive snap bean plantings give a steady supply from early summer until fall. These beans, in varieties from bush to pole, are shallow-rooted and need well-drained soil without weed encroachment.
Use a shallow or slicing hoe for controlling weeds without damaging bean roots. The weeds may regrow from their roots, but repeat cultivation kills the weed. Hand-pull weeds on warm days as weeds wilt when exposed to dry air. Remove weeds at the seedling state, less than 3 inches tall, when possible.
Use mulch to reduce water evaporation, minimize weed germination and insulate the soil from extreme heat or cold. Slit cuts or holes in black plastic mulch for seeds and transplants. Apply organic mulch to reduce weeds and add soil nutrients.
Use selective herbicides to control weeds around bean plants. Herbicides containing sethoxydim kill growing grasses in vegetable gardens. Herbicides such as basagran control common broadleaved weeds. Read and follow label directions carefully.