How to make an outdoor pool umbrella half barrel flower pot stand. Shade! 1) Real/resin half barrel (drill holes in the bottom for drainage) 2) QUIKRETE or a cement block that has a hole in the center for your post 3) Put in PVC pipe (spray paint to liking) 4)Use small stones or pebbles to increase the stability. Cover with dirt and plant flowers. 6) If you use a tilt umbrella the wind may blow it in a circle. Drill hole in PVC, put screw in place.