How to Prune Erysimum cheiri 'Ruby Gem'?
Trim after flowering to prevent plants becoming leggy

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
Trim after flowering to prevent plants becoming leggy