My vals didn't grow much the first couple of weeks I've had 'em, but recently they've been growing like crazy. Two blades in particular have been growing 1/2 " - 1" a day at least, and have hit the surface. Can I just snip it? Doesn't look as nice though when the top is flat though. There's a few blades of tiger vals that were cut or torn when I bought 'em, and they're growing very slowly, so I don't want to mess up the health of the plant.