Liriodendron tulipifera – Tulip Tree (eastern North America)
Habit: An impressiv, splendid tree, 25-35 m tall, 12-20 m wide, broadly ovoid or domed to extended with round crown, straight when old with clear stem for about the first 10 m; main branches arching-upright, twigs hanging down to the ground in the lower crown region, initially fast-growing, 30-70 cm a year.
Flowers: Flower bowls like tulips, green-yellow with orange spots inside, June; flowers only after 15 years.
Fruits: Inconspicuous, cone-shaped.
Leaves: Unmistakable leaf shape; three-lobed, 15 cm long, middle lobe appears to have been cut out; fresh green, bluish green underneath; autumn colours at end of September, flaming golden yellow to yellow brown.
Roots: Shallow, far-reaching, fleshy and breaking easily, not tolerant of soil compaction, and pavement close to roots.
Demands: Sun; needs warmth, frost hardy but sensitive to late frost, broken by wind; somewhat tolerant of urban pollution.
Soil: Fresh to moist; for nutritious, sandy-loamy, always well drained mineral substrates; prefers slightly acidic or neutral pH, chalk tolerated, chlorotic with too much chalk; sensitive to salt.
Note: Spring planting recommended, roots must not be allowed to dry out; cut only in autumn or early winter.
Hardiness: Zone 6a