say goodbye if you have plecs that eat vegetation because those leaves are perfect. they like the light, but can do alright in dimmer areas
some plecs dont eat plants strictly, and some wont touch them if well fed. others, its just food. in my experience amazon swords were quite hardy and easy to growI put a chocolate plec in my tank with a sword, ate 1/4 of it in one night, and this is s huge sword. I have had no problems with some plecs though.
Get them under the light and go buy some jobes house plant spikes and stuff one under the roots about once overy couple months and it will get huge.