Herbs- Although not colorful they are one of my favorites because I'll cook with them. My favorites to have on hand are mint, rosemary, always always basil. But create your own favorite mix and have a reason to throw some chicken on the grill make some rosemary chicken for dinner.
Clematis- This brings back memories (as do herbs) of my childhood and I just love to look at them. I always have them growing up one of the posts of my patio. Just wrap a string around the post so that they have something to hold on to.
Citronella- Is there anything more annoying than mosquito's when you are attempting to enjoy the outdoors and your drink? A Citronella plant will keep those nasty little buggers away. Maybe get two.
Below, is my favorite flower on the patio wall. It's small, colorful and adorable!