When you get your pond plants, keep them cool and shaded until you are ready to put the plants away. Do not expose them to air or sunlight before you are prepared to deal with them. Water lilies and similar plants such as water fringe and water poppy will dry out quickly. If purchased bare root, it is best to pot them immediately. Otherwise, some exposed leaves and stems are likely to dry out and die, even if they are being floated in the pond. Plants which grow with their leaves out of water may need shielding from hot sun for a few days