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Perennial (Winter Hardy) Water Lily Cultivars can survive winter in almost any location properly planted many weeks before the first frost and below where ice will form in the pond. Hardy lilies if they ever would perish in winter are more likely to do so from stress of being overgrown and without any sunlight for a lengthy period where snow builds up over the ice above the plant for weeks on end. A pond de-icer therefore actually saves more than fish in snowy northern areas, it may save a water lily. Though in most instances these survive fine at 2 or 3 feet deep especially medium and large varieties. If growing in a cointainer in a lined pond be sure they are not overcrowded and split every 1 to 2 years.
