I found this two-drawer end table next to the dumpsters at our apartment complex. It's a cute little piece of furniture, solid and wooden — not particle board — and as soon as I saw it, I thought, "plant shelf!" I carried it to the back porch, and there it sat for three weeks getting even more water-damaged and wrecked (darn real job getting in the way of making cool things).
By the time I got around to working on it, the top of the table had warped and bubbled up on one end. I thought it might be a lost cause, but I slathered on some wood glue and clamped it down with welding clamps (you could use any kind of clamps, of course, or a handy cinder block might work in a pinch).
After letting the glue dry for 24 hours and sanding off as much of the old paint as possible, I painted the shelf, inside and out, with a semi gloss exterior paint. This color is called "Tropical Blossom."
Maybe it was the paint fumes, but I had another idea: it's not a plant shelf, it's a planter!
I drilled a few holes in the bottoms of the drawers for drainage then painted the insides of the drawers with several coats of exterior paint, making sure to coat but not fill in the holes. I then used more wood glue to secure wooden supports for the drawers, one pulled all the way out and the other about half open.
I filled the drawers with dirt and planted some plants with fairly shallow roots near the fronts of the drawers. Time will tell how it holds up to the elements, but for now it really brightens up the back porch!