How to Propagate Californian lilac 'Topaze'?
Propagate by softwood cuttings in mid to late summer

Californian lilac 'Topaze' · Ceanothus × delileanus 'Topaze'
Grow in fertile, well-drained soil in full sun with shelter from strong, cold winds. Lime tolerant but may become chlorotic on shallow chalk soils. See ceanothus cultivation
Propagate by softwood cuttings in mid to late summer