In zone 8b I would be careful about the depth of planting. Just the neck should be exposed, and you probably should use a good layer of a light mulch, such as dry leaves, which can be removed in spring. Sometimes you don't get good blooming if the bulbs don't get enough hours of sun. Try moving to a sunnier location, and give regular water and fertilizer in the summer. This worked for me one time, when I had bulbs that wouldn't bloom, they were shaded by Canna Lilies that had big leaves. Moving them to a full sun location did bring blooms the next summer.
