Tower of Herbs Container herb garden for a patio. I like this idea! I already have the pot arrangement, but it went empty this year. : (
Materials:

•     5 terra-cotta planters
•     Soilless potting mix
•     Assorted herbs

1. Place largest planter in the location selected for the herb garden. Center 1 smaller pot within, upside down (with at least 6 inches of space around the inverted pot); fill ring between the two with potting mix.
2. Repeat to create a second layer with 2 smaller pots, with 4 inches between them. Place final pot right side up on second inverted pot. Fill with potting mix. Plant herbs in all three layers.

Credit: www.marthastewart.com