How to Propagate sweet gum 'Pendula'?
Propagate by semi-hardwood cuttings

sweet gum 'Pendula' · Liquidambar styraciflua 'Pendula'
Grow in moist but well-drained, neutral to acid, moderately fertile soil, in full sun or partial shade. Suitable for woodlands or as a specimen tree. Full sun brings out the best autumn colour - see tree cultivation
Propagate by semi-hardwood cuttings