Centranthus ruber 'Pretty Betsy'
Other plants you might like if you grow red valerian.
abelia
Abelia 'Edward Goucher'
Abelia 'Rose Creek'
Adriatic bellflower
Campanula garganica 'Dickson's Gold'
African daisy
Arctotis hybrida
ajania
Ajania pacifica
Alps yarrow
Achillea distans
alternate-leaved butterfly bush
Buddleja alternifolia
American boneset
Eupatorium perfoliatum 'Milk and Cookies'
