All pond vegetation spreads, that is what plants do as nature demands; some spread faster than others. . If you do the lilies there are 4 hybrid varieties or types of area spread and depth they grow starting with slowest, shallowest first. Dwarf, Small, Medium, Large. Buy them according to where and depth you want then to grow. All these do not spread nearly as fast as Spadderdock and wild native white water lily. Both have fertile seeds that float to other areas. .I've seen spadderdock once well established with huge roots 4" wide 6ft-8ftr long, take over a 3/4 ac pond 16ft deep. I have seen wild white lilies spread and take over a shallow pond corner out to 7ft deep in 3 yrs with fertile seeds and fragments of the rhizome easily breaking off, floating and regrowing where ever they float to, Eel grass native Vallisneria americana helps produce clearer water, fish can hunt through it and it can grow 6ft tall down to 18ft deep as it tends to make the water clearer. Water clarity allows most all submerged vegetation to grow where ever there is light penetration. American pondweed (aka long leaf) stays fairly shallow 3-4ft maybe 5ft due to its floating leaves and growth habit. Choose the right plant for your purpose. You don't plant huge growing trees 2 ft from the house.

Use the information topics in our Archives for homework.
Archives
https://forums.pondboss.com/ubbthreads.php?ubb=postlist&Board=22&page=1
Useful Plants
https://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=440475#Post440475

Consider using large coarse tree branches and creating artificial habitat to supplement the plants.
Lots of examples are available. Be creative.
https://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=92463#Post92463

Last edited by Bill Cody; 01/30/23 12:20 PM.

aka Pond Doctor & Dr. Perca Read Pond Boss Magazine -
America's Journal of Pond Management