Is my plant dead?

Hi all, I am fairly new to gardening and new to this forum. I'm hoping someone can help me. I planted a Tricyrtis Taipei Silk last year and although it did well it doesn't look like it's survived the winter. I forgot to protect it during the cold month and I'm hoping all is not lost, although it doesn't look like it's coming back to life. It's showing no sign of green growth at all, just brown dry sticks at the moment. I would thought by now there might be some greenery showing? Does anyone know if this has died during t winter months or whether there is still hope?