The stalks of the fern are lying flat on the ground. Will they gain strength and stand up once warmer weather comes? They have been beautiful and healthy for four years now. Something happened this winter. Please advise.
You generally do not have to prune a Christmas Fern, but if they have been damaged or broken, they can be removed.
A Christmas Fern will very commonly lay it's fronds flat on the ground during winter. This is how the plant protects itself.
You fern will likely began to lift it's fronds as the weather warms.
Only when the new young ferns grow will the previous years fronds turn yellow and die.
You can apply fertilizer in the spring. A light application of a granular fertilizer for acid loving plants.