Hey, Aggie. There are several kinds of obedient plants. Can you be more specific? If it is the common sensitive plant, mimosa pudica you should be aware that it is somewhat toxic. If you have fish that graze on plants it might not be suitable.I certainly agree it is attractive. I have seen it sold as a pond plant.It can do well in some ponds but it can be a bit finicky.

Another Obedient plant is a member of the mint family. It might do quite well growing on the side of the pond. If it likes the water it will soon spread there. Most mints are invasive.

A plant that is sometimes confused with that one is loosestrife. You must be very careful not to use Purple loosestrife which is a disastrously invasive plant especially in wetlands. There are plenty of other varieties that are not invasive.