Gardening books usually say sweetflags (Acorus) should be grown in moist soil.

However, from the Asian sources I have read, it appears in the East the same plant is often grown (as a container plant) in pebbles in water, even the growth of the plant would be stunted.

So I was wondering if anybody here have experience of growing sweet flags in a basically soil-free environment, outdoors or indoors...?

Thanks for the help in advance!