Begin by making a small pea-sized ball of clay in one of your colors and place it towards the top of your planter.
Press the palette knife into the clay and pull down to “smear” the clay into a petal shape.
Repeat this process all around the top of the planter, then move down and create a second row in between the petals of the first layer. Repeat all the way down the planter, leaving a bit of planter uncovered at the bottom (this is optional as you could bring the clay all the way to the bottom if you wanted).
Place the planter on an oven safe baking sheet and bake at 300°F for 15 minutes to set the clay. Once cooled, your planter is ready to be used.