low growing perennials
Recently purchased a 2nd home in Tucson. Spend most of our time in Portland, OR currently. We are trying to add some color to a planter on the southside of the house that is partially shaded by a mesquite tree midday, otherwise some morning and evening sun. Drip irrigation in place. Looking for suggestions for colorful perennials that mature at a height of about 18-24 inches or less (dont want them above the bottom of the window). Planter is about 18 inches deep and 6-7 feet long. Not interested in cacti for this location and we already have lots of lantana in the landscape. Any suggestions would be much appreciated.