Smart! Instead of putting rocks in the bottom of big porch planters, fill the bottom with sealed empty plastic 20 ounce bottles! They give the pot the drainage it needs, without adding all that extra weight!
DIY Rain Barrel | 1 Crafty Lane. Except make sure to put a mesh screen in it to catch debris----Hmmm my husband found 1 of those green gutter extensions on our dirt road 1 day & gave it to me & I could use it for a diy rain barrel!