The simplest way to keep weeds down is to use mulch (grass clipping work) or layers newspaper between the rows. Another simple way is to put landscape fabric down after you work the soil and cut a large X in the spots where you want a plant and place the small plants in the center of the X. You may leave it like that or place some mulch over the landscape fabric to keep the bed looking neat. That will also help the soil retain water.
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