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.
Buried Pot Garden Sunken planter gardens like this one provide both form and function. The pots prevent your herbs or plants from overrunning their designated areas, and the mulch keeps unwanted weeds and pests at bay while consuming no water and energy.