I have heard Carlton naturalizes well in Texas. I am in east Texas and am looking at which daffodils and jonquils to purchase. Does anyone know which varieties of these bulbs naturalizes well here?
Check out this link.
Here is a link that might be useful: Narcissus for hot climates
If you look at a good bulb catalog, for example, Brent and Becky's, you will see that there are several divisions of daffodils. As a rule of thumb, jonquilla division is your best bet almost every time. They tend to be smaller bulbs, but they will return and multiply like crazy in your area. They don't mind damp soil, heavy soil, or humidity. They don't need much cold in the winter to come back. They are also early blooming and very sweetly fragrant. Early blooming is important because the later bloomers are often gone in a few short days due to our early warm weather.
If you want to know more about bulbs in your area, you would do well to order a copy of Garden Bulbs for the South by Scott Ogden. It's indispensable for me.
Here are some daffodils that I have had great luck with in east central MS.
Martinette (BIG bloom)
Not a daffodil, but a truly excellent spring blooming bulb is Leucojum. It will do in some shade and doesn't mind damp at all. Ditto, Ipheion, especially Rolf Fiedler.