Pruning northern Maidenhair Fern encourages vigorous growth by removing dead or overgrown fronds, improving air circulation and light penetration. It also maintains the fern’s delicate shape, effectively enhancing its ornamental appeal.

Pruning or trimming northern Maidenhair Fern during Late winter or Early spring is considered optimal because this timing aligns with the plant's dormancy period. During the colder months, northern Maidenhair Fern naturally enters a resting state, wherein growth is temporarily halted. This state of dormancy means that the plant is less susceptible to stress and damage that can be caused by pruning. Additionally, the absence of foliage at this stage provides a clearer view of the plant's structure, making it easier to identify which fronds should be removed - typically those that are damaged or diseased. Pruning in this period prepares northern Maidenhair Fern for robust growth in the upcoming growing season as resources are redirected to the healthier parts of the plant. It minimizes the risk of transmitting diseases and reduces the energy expended on maintaining unnecessary or non-viable fronds. By adhering to the provided pruning seasons, the gardener ensures that northern Maidenhair Fern maintains its aesthetic form and vibrant health without interfering with its natural growth cycle or the emergence of new fronds.