Propagation
Sow seeds when ripe in situ or in a container and place in an open frame. Germination will occur during spring, prick out and pot up and place outside to harden off.

Botanic information
Leaf: The slightly leathery textured leaves are triangular-ovate with 3-obtuse to acute lobes that are up to 75mm (3in) wide. The upper surface is glossy dark green and the underside has obvious reticulated venation. The slender reddish petiole is up to 60mm (2 3/8in) in length.

Flower: The unisexual crateriform flowers have 4-sepal and petals with up to 10-stamens. They are arranged in pendant auxiliary corymb that appears profusely during early summer.

Fruit: The twin samara is reddish with connivent or overlapping wings. 

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.