I got two Drosera capensis through the mail, and they haven't been doing too great after being potted. They were in transit for maybe 4 or 5 days, then I potted them in 50:50 perlite:sphagnum mix. I've been keeping them under clear lids to keep them humid- only one has developed dew so far but the other hasn't. Its leaves have started going black, even the new one it was growing. ): I read somewhere that you can trim the roots and they sometimes fare better after that. Is this a good idea? If not, what else can I do?