How to Prune gold-edged box elder?
Little pruning is needed. Remove diseased, damaged, crowded or crossing shoots and unwanted growth. Prune only from late autumn to mid-winter.

gold-edged box elder · Acer negundo 'Auratum'
Also known as: box elder 'Auratum'
Grow in moisture-retentive, well-drained soil in sun or part shade
Little pruning is needed. Remove diseased, damaged, crowded or crossing shoots and unwanted growth. Prune only from late autumn to mid-winter.