I've done both, sticking it in a pot, and in water. All props in the past few years have been directly to soil. How much were you thinking about cutting? With such long stems, I'd probably try to plant them in an "L" shape under the soil if they'll bend w/o breaking. One looks almost that shape anyway. Might pop up some new tops from the buried length of stem, if it's not too deep. Theoretically, every node can make roots/shoots, but IDK if Ags respond this way like some other plants can. It's what I'd try if I had the same long stems to work with. (Mine are all short because I do cut them off & start the tops so often, used a few bunches as landscaping in the ground last year.)
