Hi Y'all, Perfect Pictures and Constructive Comments! I understand the desire to beautify the ditch and make maintenance easier. My mom's house has drainage path that is between her and the neighbor, actually on neighbor's lot. A previous neighbor put rocks along drainage path, no plants. I'm sure it helps drainage, slightly unsightly. Mom can't do anything with it since it is on neighbor's property. Since we have wetlands here, the yellow and purple Louisiana iris are lovely in spring. When blooming stops the green foliage is still pretty. One thing to avoid is trees or plants with root systems that may clog drainage ditch. My neighbors planted a cedar tree over drain. Tree grew well due to water in ditch. However, roots clogged drain, causing poor drainage in heavy rains. Then the tree caused problems when it had to be removed. Now drainage is better!
Will love to see before and after photos!