Anything like this which is being grown in a pot is probably going to need a lot of artificial feeding to do well--or bloom-- especially if it is watered frequently.
I have a pet canna which has lived and thriven in a 24" pot for a decade--water canna, Canna glauca, 'Panache'-- and I repot it every spring, keep it set in a tray of water-- which must be drained and refreshed weekly to keep mosquitoes down-- and feed it every two weeks with basic Miracle-Gro. It's wintering in the basement as we speak.
Some years ago Bill Smoot posted his formula for making a bog over on the Iris-L. He gets a plastic child's wading pool-- one of the inexpensive ones which are perhaps ten inches or a foot deep and four or five feet across, all one piece, no moving parts, see them at KMart and such-- and he excavates a suitable depression, sinks the pool into the soil, then punches some holes in the bottom, and then fills and plants. Thus, while there is drainage, it is slower. I would think that if one were to leave the top two or three inches of the side of the wading pool above the soil line, one would have a physical barrier to rhizome creep. I think you might not have as much problem with rodents with this system, too, especially provided you used an inorganic mulch.
I grow my pseudacorus in pots and they do fine, albeit I set the pots in trays of water when the plants look like they need it. I don't feed them as heavily as I do the canna.
AMW
-----Original Message-----
From: Rodney Barton <rbartontx@yahoo.com>
To: iris-species <iris-species@yahoogroups.com>
Sent: Fri, Jan 18, 2013 10:13 am
Subject: Re: [iris-species] Louisianas
I've had pretty good luck in 24 in pots. Some plants that I can't keep in the ground survive better in the pots. I've done smaller pots as well, but blooms seems reduced.
Rod
From: Mark A. Cook <b*@bellsouth.net>
To: i*@yahoogroups.com
Sent: Thursday, January 17, 2013 7:52 PM
Subject: [iris-species] Louisianas
Out of curiosity, has anyone tried growing Louisiana Irises in containers? If so, did it work without them destroying the container?
Mark A. Cook
b*@bellsouth.net
Dunnellon, Florida.
