We recently got these planter boxes for out deck railing, they need a special mounting bracket to hold them. I wanted to take a shot at making them before buying some.
The final product! Because the aluminum is so soft, it tends to sag under the weight of the dirt in the planter. If I were to do it again I'd try to make them out of a more stout material or brace it somehow. But in any case, for $10.
1/8" x 3/4" x 36" aluminum stock
The bending method
One thing to be careful of is bending the aluminum too fast or you risk breaking it! Which is what happened to me:
Snap! Right in the kisser!