As small trees go, the Japanese maple is a winner, offering intricately shaped, colourful foliage and luminous autumn tints as well as clusters of small purplish red flowers and winged seeds. These elegant Orientals grow well in containers and can transform a small plot. However, while not exactly difficult to grow, they do need some understanding. Being fussy about picking the right spot for them can make the difference between a thriving, long-lived tree and a poor specimen that’s constantly at risk of die-back. There are two species commonly known as ‘Japanese maples’ but we will put A. japonicum to one side and concentrate here on A. palmatum. This variable, somewhat rounded tree reaches up to 20ft (6m) high in cultivation but it can be twice this in the wild. Leaves are lobed into five or seven sections and can be intricately subdivided and almost fern-like, or coloured orange, gold or red throughout the growing season. The Japanese have enjoyed this and its many vari...