Suggestions for high altitude Daffodils in Denver

Here in the upper Midwest you want early cultivars. Poets have their roots most of the year and come up late enough that they do not freeze out. Actaea and Gweal are early cultivars that should do well for you. Early trumpets and cyclamineus hybrids that are early also should do well for you. We are Zone 4B west or south facing slopes do better than east or north slopes.