Propagation
Collect seeds when green and they can be sowed directly or stratify for 2 to 3 months and then place in a cold frame. Germination may take up to 2 years. 

Botanic information
Leaf: The mid green leaves are ovate to oblong, up to 65mm (2½in) wide and may be shallowed lobed. The apex is acuminate and the reddish petiole is up to 50mm (2in) long. The veins on the underside have reddish-hairs when young and the leaves turn orange during autumn before falling.

Flower: The tiny unisexual crateriform flowers are pale-yellow with 5-sepals and petals. They are arranged in slender pendant axillary racemes up to 76mm (3in) long. The female flowers appear on different raceme that is longer during late spring.

Fruit: The pink-brown samara has wings that diverge at an obtuse angle.

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.