Could someone suggest me some plants that will not put out root everywhere.

Hygrophila is among the "rootiest" of stem plants. You might have better luck
with babytears, Rotala, Ludwigia, Bacopa, or Didiplis diandra. Some of these
do produce occasionaly roots, but not anything like Hygro.



Leigh

http://www.fortunecity.com/lavender/halloween/881/