Aralia ‘Sun King’ is a striking perennial with bright chartreuse foliage. Plant it in a location with partial to full shade to maintain its vibrant color, as too much sun can cause leaf scorch. Ensure the soil is well-draining and consistently moist, but avoid waterlogging. Mulch around the base to retain moisture and suppress weeds. Fertilize in early spring with a balanced, slow-release fertilizer to encourage healthy growth. Regularly remove any dead or damaged leaves to maintain its appearance and promote air circulation.