They both, however, have deep root systems which are not really suitable for hanging baskets. A better alternative is the Safari Sky South African Phlox (Jamesbrittenia). This produces a delicate pattern that looks stunning in hanging baskets placed in the full sun on patios and porches. The Safari Sky South African Phlox also has a trailing habit. Just make sure that you use drip pans when planting phlox or any other flowers in a hanging basket, as they will keep your hanging flower baskets hydrated in the summer heat, reducing their chances of wilting.