Reply to Scoobydooby: There are so many plants to choose from, but your choice does depend on quite how much light the wall basket gets. For shaded positions I'd recommend evergreen, variegated ivy to trail down, plus try impatiens, and possibly fuchsias if not too shaded. Begonias might be OK, especially trailing varieties or types of Begonia semperflorens. Others to consider include nepeta, helichrysum, scaevola (fan flower), and others.
Also consider hardy perennials like heuchera and ferns.
Many houseplants would also be suitable, including spider plants.