Arnold's Buckeye Related to the familiar horse chestnut, Aesculus x arnoldiana is a natural hybrid between three North American species. A large, deciduous tree, it has a much more open habit than the horse chestnut. Huge ‘candles’ of pale yellow flowers, marked with red and held clear of the leaves cover the tree in late spring, followed in autumn by green fruits, which split to reveal conker-like nuts. The leaves are large, and divided into leaflets; lime-green when young, they turn deeper green in summer and often show very good colour in autumn. Arnold’s Buckeye is tolerant of urban pollution, and makes a good specimen tree for a large garden. Site: Tolerates exposureSoil: Any reasonably well drained soilPosition: Full sun or partial shadeSeason of Interest: Spring, autumnHardiness: Fully hardyHeight: Eventually up to 75ft (23m) Spread: 26ft (8m) after 20 years