I have a border I am creating along a walkway in my back yard. I have two rows of Agapanthus along the length of the pathway on one side and plan to put Crocosmia "Solfatere" behind them. I am looking for an accent shrub(s) that I could mix into this bed to give it some structure and height variation. I had planted a Crape Myrtle in the center of the bed, but lost it in a hard frost (it was borderline for my zone...bad gardener!). Any suggestions? Thanks!