Select a planting site. Mule ears grow along foothills and open meadows in the wild, so provide a similar area if possible. Full sun is also a priority.
Loosen the soil in the chosen planting site to a depth of at least 12 inches. Mule ears have long, thick roots that require a loose, well-drained soil.
Mix 4 inches of compost into the top 12 inches of soil.
Dig a hole for each plant, twice as wide and the same height as the root ball. Make the root ball of each plant level with the surface of the soil. Space each plant 12 inches apart.
Water the soil until thoroughly moist to a depth of 12 inches. Water slowly to prevent flooding the soil. Water the soil to the same depth as soon as the top inch of soil feels dry.