Baking soda neutralizes the ph in the soil and weeds won't grow there. Use baking soda in a wide area around the edges of flower beds. Just sprinkle it onto the soil so that it covers it lightly. Do this twice a year - spring and fall.
PVC Pipe Planter Disney world does this! Lowes sells the 4 to round PVC pipe with holes already drilled. Purchase an end cap, fill with rock, soil, and plant. I will often put these in the center of a very large pot to stabilize, and add amazing heigh
Put newspaper over the dirt pages thick & then cover it with mulch. The newspaper will prevent any grass & weed seeds from germinating, but unlike fabric, it will decompose after about 18 months. By that time, any grass & weed seeds that had been pres