bletilla striata stalling

[neophyte]

my Bletilla striata sprouted really early this year (december-ish) because it was sitting next to the vent and i guess the hot air tricked into thinking it was time to send out new growths... but now it's stalling and not doing anything. i understand that it's pretty early and that they may just need to wait, but i don't see any new leaves emerging as of now and i'm starting to doubt the current leaves are going to get any bigger...

should i be worried? should i fertilize? i'm not sure what to do (except wait)...

ps: the browning leaf is last year's growth which never died back till now (i only got it last summer)