I love this plant for my large hanging baskets! They take direct sun for most of the day, and are hardy and beautiful! I never have to worry if I miss a day of watering - they will still be fine for another day! I have also had this plant with pink flowers and white flowers - both are nice as well, but I tend to lean toward the purple flowers more. Plus they are easier to find!
Keep in mind, however, that these are not the easiest plants to locate for some reason.... they have not fully caught on here in the states... which I cannot understand why! The hummingbirds like them as well - that's another bonus! I started off buying them in large hanging planters, but then found that I could purchase 4 inch pots of them at a few places, which meant I could plant them, feed them, and make sure the roots had room to spread.
In fact, I am seeking these plants myself, currently! So far have not found them except for in $30 hanging baskets that are extremely crowded in their pots.