How do I keep a 'Marble Queen' sword emersed?



I bought a Marble Queen Sword (Echinodorus cordifolius) today, not for a tank, but to grow emersed. I remember someone told me the leaves "resisted drying" and that it could be easily grown emersed.

Now I'm guessing how to actually do it. I thought of trying this: put it in a pot w/o drainage in a 70/30 mixture of Soil Master Select & potting soil and keep it soaked. Is this a good or bad idea? Anyone know how to really do this? It's a beautiful plant, I'd hate to kill it. :eek: