Likely it's transplant shock. But once she get's used to the fresh soil and the nutrients in it, she should start to show new growth within the week, unless during the transplant you dropped her or broke shitloads of roots.

Says 4 months of feeding on the bag doesn't it? So no additional nutrients till the nutrients in the soil have been exhausted. In reality, it only takes a month or so to deplete the existing nutrients.

If planning on this being a successful venture, you're going to need proper nutrients, proper lighting and a way to check water ph....for starters.