When we built a new side yard patio, the location of our air conditioner was less than ideal. So I smashed old plates, cut up old mirror and pieces of stained glass, to make a two sided mosaic screen that picks up the colors of the surrounding hostas.
The cream colored grout is sealed, old fence posts were used as the ends and the whole thing is movable in case we have to get at the air conditioner. It's much nicer to look at than the grey turbine.
Have monkey grass that can be used, but open for other options.
Commented on Jun 07, 2012
Remember to find plants that will not grow wild, how much work do you want to do (pruning
cutting watering) As suggested above I would make the bedding curved so everything doesn't look boxy, how good is the soil does it need to be improved, edging of the area for easier grass cutting. Also you might want to put in screening deep in prior to planting anything so little animals will not make a home underneath the porch (skunks). Evergreens high enough to cover porch foundation, small colorful perineal's for longer color and a few annuals. Then from top of the porch hang a few annual baskets.