I got this blc Susan Harry a few weeks ago. It's growing new roots like crazy and has a couple new growths making good progress. One leaf however is v-shaped and not fully "opened" like the others. This leaf came with a sheath growing from it but it turned black and I removed it. Just wondering if the leaf will open up as it matures? I don't know much about catts other than they're gorgeous and I'm excited to be growing them so any info that more experienced members can offer will be GREATLY appreciated