You must eliminate all weeds during this initial soil preparation period before plants are added or seeds are sown. Untold difficulties arise when perennial weeds, such as bindweed or quackgrass, grow through a carefully planted bed. Because of the diversity among perennials, it is risky to chemically treat weeds in close proximity to valuable plantings. It may be possible, however, to treat individual weeds with a herbicide recommended for use on perennials.
Work the bed for one year before planting to kill all weed seedlings as seeds germinate.
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