Japanese Emperor Oak This is a stunning large leaved oak, with leaves reaching as much as 1 foot long and 7 inches wide. Known for its hardiness, it grows at a relatively slow rate, ultimately to approx 12+ metres. Quite unusual among European growers, it will become a prized specimen in any mid sized garden. Site: Tolerates some exposureSoil: Any soil Position: Full sunSeason of Interest: Large leaves in summer, dead leaves hang until springHardiness: Fully hardyHeight: 40ft (12m) Spread: 30ft (9m)