How to Propagate Erysimum cheiri 'Ruby Gem'?
Propagate by seed or by softwood cuttings in spring or summer

Erysimum cheiri 'Ruby Gem' · Erysimum cheiri 'Ruby Gem'
Grow in a sunny position in poor to moderately fertile, well-drained, neutral to alkaline soil. Usually grown as a biennial, plant out at the end of summer for flowers the following year
Propagate by seed or by softwood cuttings in spring or summer