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.
Garden Project: Cinder Block Succulent Planter What a great idea. All of my raised beds are made with cinder blocks and next spring we are downsizing. I had no idea what to do with the extra blocks, now I know what to do with them.