Introducing height and structure to your garden with tiered planters is easy. Begin by finding three pots of descending size with drainage holes. The pots can be uniform in style or mixed. This example uses terra-cotta pots; the one at the base is 2 feet in diameter. Choose a location carefully; the final construction will be very heavy. Fill the largest pot evenly with potting mix nearly to the rim. Center the medium-size pot on the larger one, then fill; follow with the smallest. Select plants of various colors to accentuate the tiered configuration; trailing foliage creates a hanging-garden effect.