rainbowgardener wrote:If your planter will sit on the ground/dirt, you can grow pretty much anything you want to grow in it... Break up the ground a bit first with a pitchfork before you put the bed down. It will help with drainage and letting the roots of your plants grow down into the soil.
Composite and metal shouldn't be much difficulty for maintenance. If you don't like the looks of it grow ground cover- things in the edge of your bed, (just inside it) to drape down over the sides. Oregano and thyme would be good for this and provide some herbs as well. Or plant some flowers in front of it; shorter things that won't grow up to shade what is in the beds. Nice mound-y things like hardy geraniums and sweet alyssum would be nice in front of it.
Thank you rainbowgardener, I'm going to plant mini rose and some herbs, is it suitable for vines? And I'm afraid the composite and metal ends look strange, they are two different materials after all.