Like a plant in a Dr. Seuss book, tree sonchus has a pleasingly odd, wayward appearance. Its finely dissected foliage resembles fern fronds, and its flowers look like sulfur-color dandelions. It blooms for weeks in spring and requires little supplemental watering. Plant tree sonchus in a mixed border or container planting to add intrigue and drama to the scene. Its easy-care nature makes it a valuable member of the semitropical garden.