As such, this document and the techniques it describes have been revised and will undoubtedly continue to be revised as more experience is gained.
Customer feedback is always welcome.
Fertilizing should stop about six weeks before first frost. Wait until cold weather starts turning the plant's leaves from green to yellow or brown, then trim off all the foliage, and follow one of the methods described below. The Deep Pond method for hardy lilies and marginals. Move plants back up to their original shallower locations promptly in the Spring. Arrowhead, most Rush, Plantain, Hardy Lily, Iris, Sweetflag, Spider Lily, Glyceria, Sago Pond Plant, Vallisneria americum, Creeping Primrose, Wild Reed, Parrot's Feather and Acorus.