So, what is the best choice of flower that will do well in hanging baskets?

Trailing verbena is great for hanging baskets, window boxes, and raised planters. Its spreading stems naturally spill out of containers and form a color-cascading waterfall of blooms. Trailing verbena is used by many gardeners in combination with petunia or calibrachoa for the creation of colorful mixed borders that are good through the season from spring to fall.