Hello I am new here and I have a question, as well as having more questions later on I'm sure. I have both a "Forever Susan" lily and a "Double Tiger Orange" lily. They are approx. 10" tall now. I understand that they will grow from 36" to 48" tall. Is it possible to prune or train them to not exceed the plants no taller than 24" tall, without killing them? Any advise what greatly appreciated! Thanks!