Glosso has the same problem -- let it grow over itself long enough and eventually what's underneath will die off. While you can let glosso grow to over an inch thick before this starts to happen, you also have to remember that glosso grows MUCH faster than HC.
At the end of the day, it's still necessary to mow glosso down every 4-6 weeks (depending on how fast it grows in the tank) to keep it low, compact, and healthy.
Elocharis 'Belem' - I only have a few months worth of experience with this plant, but so far in my tank, I've been able to plant it and left it as is for several months without having to trim. I think due to its leaves being very thin, it takes a very long time to have it get dense enough to get anything shadowed. Like I said, I'm still new to this plant, but right now my opinion is it's much less work than HC or glosso.
Last edited by zergling; 12-18-2012 at 08:01 PM.