A spilled flower pot is the perfect idea of bringing a little whimsy to your garden. Just tip Southern Patio’s Natural Oak Whiskey Barrel on its side, plant bushels of mums, and you have your own spilled flower planter.
Hide the downspout with a trellis. Hide your rain spout by transforming into a decorative climbing support for your favorite flowering climbing vine. I really like this idea and it looks great too. - Gardening For Life
Purchase an end cap, fill with rock, soil, and plant. You can put these in the center of a very large pot to stabilize, and add amazing height and color to a container that has trailing plants (no end cap or rock needed if you are placing in a container)