Propagation
Sow seed when ripe in pots and maintain a temperature of 10º to 13º C. (50º to 55º F) for up to 3 months.

Botanic information
Leaf: The broadly ovate glabrous leaves have 3-5 lobes, 2-laterals and the middle being longer with an acuminate apex. The upper surface is deep dark green and the underside is pale-green with a petiole up to 45 mm (1¾in) long. During autumn leaves turn shades of red before falling.

Flower: The small yellowish-white cyathiform flowers have 5-pointed calyx lobes and are arranged in an upright terminal panicle to 38 mm (1½in) in diameter and appears during mid-spring.

Fruit: The reddish-green twin samara is joined at the base with obovate reddish parallel wings that are up to 30mm (1⅛in) long. The ovoid seed is compressed and the fruit persists on the plant until autumn.

General information on pruning Acer species 
The Maples normally do not require regular pruning apart from damaged, diseased or dead wood removal and this should be carried out from autumn to winter. 

Pruning in late winter or spring may result in bleeding of the sap and should be avoided. Remove reverted branches in variegated trees and clean up split bark with a sharp knife and allow natural healing.