Tropical waterlilies make a beautiful centerpiece in your water garden. They will steal the show with their large, exotic and pleasantly fragrant flowers. The flowers rise several inches out of the water and are more prolific than hardy lilies. Night-blooming water lilies are quite popular with pond owners who like to enjoy their ponds later in the evening or early morning. Flowers of the day-blooming open mid-morning and remain open until late afternoon or early evening. Night blooming waterlilies open at dusk and stay open until mid-morning or noon. Tropical water lilies can safely be placed outdoors when the water temperatures are a consistent 65+ degrees. Tropical water lilies that are marked as "Viviparous" will tolerate cooler water temperatures and bloom later into the fall months.