Daffodils are one of the easiest to grow and most popular spring flowering bulbs. If you think you know all about daffodils, consider that there are over 50 species and, according to the National Daffodil Society (NDS), there are "...over 25,000 registered cultivars (named hybrids) divided among the thirteen divisions of the official classification system." There's more to daffodils than the pretty yellow trumpet flowers that cheer up the spring landscape.

There's no data on how long a daffodil plant can live, but a stand of daffodil bulbs can easily out-live the person who plants them. You can often tell where a house foundation used to be because of the outline provided by the daffodils that were planted around it.

There's been a lot of confusion about whether all Narcissus were daffodils, but the NDS has put the matter to rest by saying the terms are synonymous. The botanical name, Narcissus, should be used for scientific writing and daffodil everywhere else. So daffodil it is.

https://www.thespruce.com/planting-and-growing-daffodils-1402136