Buried Pot Garden! Not only will your garden be extraordinarily charming and tidy, it'll consume less water and energy. 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.
I did this. My suggestion would be to add cardboard or something up the sides to hold water. My garden did SO WELL, but it dried out easily. Also, in the individual holes, I planted herbs, green peppers and zucchini. They did excellent also!! - Garden Ideas