Description for Liriodendron, Tulip Tree, Tulip Poplar Plant height: 3 - 6 inches Plant spread: Look upward in April to June in parts of the east and southeast parts of the United States. During these months in the spring, the tulip poplar tree will be in full bloom with yellowish green to orange cupped fragrant flowers, 2 to 3 inches in diameter covering the plant. Common name(s): Liriodendron, Tulip Tree, Tulip Poplar Plant,Liriodendron tulipifera. Flower colours: Yellow with orange Bloom time: May to June Max reachable height: 60.00 to 90.00 feet Difficulty to grow: easy to grow Planting and care Liriodendron tulipifera—known as the tulip tree, American tulip tree, tuliptree, tulip poplar, whitewood, fiddle-tree, and yellow poplar—is the Western Hemisphere representative of the two-species genus Liriodendron, and the tallest eastern hardwood. ... The tulip tree is the state tree of Indiana, Kentucky, and Tennessee. Sunlight: Full Sun Soil: well-drained soil