large front flowerbed under tree
I have a large flowerbed in the front yard that I just don't know what to do with. Several years ago we enlarged it, in part to keep neighbors from constantly cutting through our yard. We may have made it too big though! 4 years later it is mostly an eyesore. We've had it looking decent a few times mostly with annuals, but it's too costly to continue filling it up that way. Currently, there are mums that have been doing well across the front of the bed. Last fall I thinned them out and spread them around the rest of the border. Last year it was also full of Blackberry lilies. Boy can that stuff spread! At one point I was just going to let it keep spreading and fill the bed, but overall it was too "wild" and unkept looking. At the end of summer I pulled most of them out, but there are still a ton of them poking up this spring. I also transplanted some wandering jew into the bed thinking it might spread and fill in as a ground cover. I don't know if I can salvage something with what I have, or if I need to just rip it all out and start fresh. I know it needs a new truckload of dirt and some good mulch, but what else? I'm in the Dallas area of TX. Hot and dry most summers, but parts of this bed are pretty heavily shaded by the Bradford Pear. (don't need to start in on the poor bradford. I know he's not popular but it's what was there...and it's pretty for now :) )
A few other ideas I've had for "filler" are lamb's ear or vinca minor. Are there other ideas of pretty perennials that might work besides just "filler"? Maybe some groupings of plants?