Although it is often used as a ground cover, it is perfect for hanging baskets exposed to a lot of sun. I use portulaca for my "hummingbird" basket. The basket has three hummingbird feeders which are not only pleasing to the eye, the hummers love them and often come here to feed. I have two colors of portulaca in the basket.
The flowers in this basket will continue to bloom all summer. They are very forgiving, don't need to be dead-headed and do well in heat and sun.