What steps should I take to overwinter aquatic plants in ponds?

To overwinter aquatic plants in your pond, first trim dead foliage to prevent decay. Move tropical plants indoors or to a greenhouse. Hardy plants like lilies can stay if the pond is deep enough to avoid freezing solid. Reduce fertilization and stop feeding plants once dormancy starts. Cover the pond with a net to control debris and ensure plants survive cold weather to flourish next season.