LOVE the umbrella nestled down in the planter! Cut 2-inch ABS pipe to the height of the pot. Center it inside and anchor in place with a layer of gravel on the bottom, quick-setting concrete in the middle, and soil on top. Plant the pot with flowers, and slide the umbrella into the pipe sleeve. A 5-foot length of pipe and 50-pound bag of Quikrete Fast-Setting concrete mix.. about 11$ total.