Cercidiphyllum japonicum – Katsura (Japan)
Habit: Medium-size or only small tree, 8-12 (15) m tall, 4-6 (10) m wide; ovoid, round crown when old, often with several stems, but also with one stem and leader; branches vertical to stiffly upright, twigs extended horizontally to slight arching, slow growing, 20-30 cm a year.
Flowers: Dioecious, reddish, small clusters before leaves shoot, April.
Leaves: Round to cordate, early shoots, beginning of May, soft bronze, later pale green, brilliant yellow-orange in autumn, more cream-white in the shade, October; never turning its colours on all alkaline or dry soil; the leaves somewhat damaged by late frost at the beginning of May and the autumn leaves give off a pleasant, far-reaching aroma.
Roots: Shallow to cordate roots, main roots often near the surface and then lifting pavements, thus leave large tree-grids open; sensitive to soil compaction.
Demands: Sun to light shade; prefers cool areas with high humidity and moist soil; sensitive to heat and drought, frost hardy, occasionally damaged by late frost, but regenerating well.
Soil: Deep, nutritious, sandy or loamy-humic soil.
Note: Best planted in spring.
Hardiness: Zone 5b