Ensure well-draining soil to prevent root rot for the Slowmound Mugo Pine. Provide full sun exposure to encourage dense growth and maintain its compact shape. Water regularly during the first growing season to establish a deep root system, then reduce frequency as the plant matures. Prune lightly in late winter or early spring to maintain shape and remove dead or damaged branches. Fertilize sparingly, as excessive nutrients can lead to unwanted leggy growth.