Be sure that trees, weeds, or other plants don't shade the lily. Although many people report good results, none of the lily varieties are reliably hardy. If the ground is well drained, you can cover plants with a mulch during the cold winter months, just as is done for roses. Mulches of straw, leaves, evergreen boughs, wood chips or ground corn cobs are satisfactory. Most of the lilies are killed by exposure to winter winds and sun.
Mulches limit the heaving action of the soil and, thus, prevent bulb exposure.
Plants hate standing water because it ruins their roots and causes them to die. The two words are synonyms. Narcissus is the Latin or botanical name for all daffodils, just as ilex is for hollies. Daffodil is the common name for all members of the genus Narcissus, and its use is recommended by the ADS at all times other than in scientific writing. Botanists differ, but there are at least 25 species, some with a great many different forms, and several natural hybrids.