Got a balcony lined with glorious geraniums or a cute dwarf palm tree? That’s all fine and dandy until you over water and/or forget to have a non-porous saucer under each and every plant. You do not want have water pooling on the concrete. If the cement becomes soaked over and over, it can contribute to spalling, which is when the water gets inside and the concrete separates from the rebar inside. It’s not just unsightly, it’s bad for the structure. So be nice to the building. Get yourself over to Green Gardens right next door and grab some plastic saucers from the array of saucers they offer in their shed area. 'Nuf said.