Step 7: Alternately stack the pots.
Place the first 8" pot by inserting the stake through the drainage hole. Let the pot rest on the dirt and the edge of the 12" pot. Continue filling the 12" pot, packing soil around the 8" leaning pot. Leave a 2" gap between the soil and the edge of the pot.
Add soil to the leaning 8" pot. Leave a 2" gap between the soil and the edge of the pot. Pack the soil around the stake (you may need to add a little water).
At this point (contrary to what the picture shows) it is advisable to go ahead and plant the flowers in the large 12" pot.
Plant the flowers in the 8" leaning pot. Then add the second leaning pot onto the stake. This pot should lean 180 degrees in the opposite direction from the pot beneath it and should rest on the edge of the one beneath it.
Continue adding soil/flowers then add the leaning pots.
You may need to adjust the position of the top pot to negate any leaning of the stake.