Daffodils are one of the easiest flower bulbs to grow, and their appearance signals the first sign of spring. These hardy flowers are pest and deer-resistant and are available in several types, including shorter varieties, like miniatures, or taller varieties such as double-cup, which refers to the size of the petals, and split-cupped, which refers to the split in the petals. Plant your daffodils in groups for a natural look. Groups of 3 are great. In time the daffodils will multiply naturally to fill in the gaps.