I couldn't be less familiar with the plants of Louisiana, but I wonder if you should modify your concept to fit what plants actually do and need, rather than design them for an imaginary plant and then go hunting for it. Be that as it may... you can likely predict when it is most likely that these floating treatment modules will most likely be flushed with water. Thus, you may be able to do something with an annual planting cycle rather than looking for a perennial. The problem with perennials is that they grow, er, perennially. That means you will be culling plants once your boxes are full of roots. If you are going to be on those modules doing maintenance a couple of times a year anyway, maybe planting something once a year in spring and cleaning it out in fall would work for you (assuming you actually have seasons down there... she asked, from the great white north, host city of the winter Olympics with no snow, but I digress). If you want something perennial though, I'm wondering if hostas would work. Not exactly native, Or ferns - some can tolerate both very wet and very dry. In both cases, ferns and hostas will give you lots of above-ground presence even when they don't fill your box, and you won't have a problem with weed seeds blowing in, which you will have if you plant something like a grass or sedum, until it fills in. Finally, can it be arranged to water the plants other than with stormwater runoff? That might also expand your options. KarinL

I've posted mine before, but here it is again. I definitely suggest hen & chicks or sedum that can really take being dry. Otherwise you are a slave to them and if you miss a day or two of watering, they're done for. I didn't line mine - just planted directly in them, no drain holes, but did cut a hole in the toe and planted it also. I leave mine out all winter. I never water mine - they only get the occasional rain and once in awhile the hose hits them if I happen to be watering something else near them, which hardly ever happens. I've never done cowboy boots - only work boots, but I'm thinking it would be neat to fill them with dirt and cut holes up and down the sides to plant sort of like a strawberry pot. Arlene Here is a link that might be useful: Garden shots

I think I agree that the leftmost plant is a Grapto of some kind. I grow a few of them & have a friend who's had lots of them. Looking at that one vs. the Ech on the right, reminds me that sometimes the center of a Grapto rosette looks lower in height (somewhat flatter if you know what I mean) than an Ech. Maybe that Grapto is amethystinum, or has such in its lineage, given its lovely purplishness.

Has anyone else seen the movie "Kiss the Ground"? (It's on Netflix right now). Wow. It was so lovely to finally have some hope and good news in 2020! I hope you all have a chance to see it! I'm now plotting to buy 10 lbs. of crimson clover seeds to toss on the bare patches of dead dirt in my yard... Maybe I should also keep a few seeds in the car, just in case I uncover some bare soil when I'm out and about...