Best Summer Bulbs for Containers: Elephant ears are dramatic plants with big, heart-shaped leaves that nod and sway in every passing breeze. Though elephant ears are only winter hardy in zones they can be grown anywhere in the U. In cool climates,
do in the fall plant layers of bulbs that will give you three bursts of color when spring arrives. Choose bulb varieties that flower a few weeks apart, such as crocus, tulips, and daffodils, which will bloom in rotation for up to six weeks.