These methods can be very effective, but only if the gardener is persistent and stays ahead of the weeds. However, vacations, rains, mosquitos, and hundreds of other things to do may allow the weeds to take over if cultivation and hand removal is the only control plan. Mulching is an excellent weed control option. Mulching provides many benefits to the garden in addition to weed control, including conserving soil moisture, preventing soil crusting, erosion control, more uniform soil temperatures, and a more attractive garden. Many organic mulch materials are available for use, including straw, hay, crushed corncobs, grass clippings, compost, and leafmold.
Shredded bark works well in flower beds.
Most organic mulches add organic matter to the soil as they decompose. Synthetic or inorganic mulches are also used on many vegetable crops. Wait until the soil warms up before putting synthetic mulches down. Don't use black plastic on perennials, shrubs, or trees, however. Commercially available fabric mulches are a better option for ornamental plants, as they allow air and water to pass through them.