How to Propagate large-spiked butterfly bush?
Propagate by hardwood cuttings in autumn, or by semi-hardwood cuttings in summer

large-spiked butterfly bush · Buddleja macrostachya
Grow in well-drained soil in full sun. See buddleja cultivation for more detailed advice
Propagate by hardwood cuttings in autumn, or by semi-hardwood cuttings in summer