Baking soda neutralizes the ph in the soil and nothing will grow there. use baking soda around all of the edges of flower beds to keep the grass and weeds from growing into beds. Just sprinkle it onto the soil so that it covers it lightly. Do this twice a year - spring and fall.
Got Pallets? Hate weeding? Don't feel like turning up a bunch of grass? Use a pallet as a garden bed - staple garden cloth on the backside of the pallet fill with dirt and start growing! Courtesy of: Backyard Diva
The tip is to design the garden to be a real showstopper, with pretty solar lights, urn centerpiece, and a bench. But what I see is a perfect garden for a back yard that has "gone to the dogs" - let them romp around the outside of it while your veggies grow undisturbed.