Ditch barrier plants for the south
I just built a house that is on a dead end bordering a drainage servitude (ditch). The loose dirt along the edge of the lot is getting washed out rather quickly by rain water (because my lot is elevated) and I thought about planting grass to prevent this. But the ditch is somewhat unsightly with plenty of "weeds" growing in it right up to my lawn so I'd rather plant something that serves the dual purpose of being a barrier to the unsightly ditch (tall, full) and also has roots that will hold that dirt tight and keep it from eroding further. The plant also needs to grow well in wet environments, in the south Louisiana climate and grow year-round and rather quickly. I'd plant a row of this plant along the ~50 foot area with the issue. Excuse my lack of horticulture lingo.
So far I've thought of bamboo (which I don't like that much, cat tails, day lilies and iris' but I think some of these are perennials and I'm not sure how rapidly they grow.
Thanks for the help.