I planted a few areas with chufa. Not expecting to see plants for a while, but the ones I didn't have room for that I still had in a jar HAVE sprouted. So my little dry tubers are OBVIOUSLY viable.
I put a bunch in the ground in one bed and used it like a border plant. Since I will be growing tomatoes behind them, I shouldn't have any trouble with light blocking. Chufa is just a tall grass.
As for the container option, I am putting some in the pond growing system. Since they grow in wetter areas, that should work well.
As for it being invasive, chufa isn't. It's relatives are.
"There are a number of references in scientific literature and on the Internet to yellow nutsedge and its relationship to chufa. Both are the same species but they are very different variants. Generally, most authorities agree that the weedy, invasive type (yellow nutsedge) is Cyperus esculentus var. esculentus, and the cultivated, non-invasive variety (chufa) is Cyperus esculentus var. sativus.
Research by Dr. Andrew Dyer at the University of South Carolina (Aiken branch) has shown that the two variants are quite different in physiology and reproductive capability. Nutsedge produces a widespread network of tubers and roots and chufa produces a compact ball of tubers directly under the center of the leaves. Nutsedge flowers early in the summer, and chufa, if it flowers at all, does so in late summer or early fall. This means the likelihood of hybridization is near zero.
Dyer has suggested that the two variants are so different that they may deserve distinct species status. Nutsedge is also invasive, spreading quickly if introduced. Chufa will not spread from a planting site, and in fact, since it does not compete well with other vegetation, will quickly die out if not maintained."