Monarch® Blue Knight Butterfly Bush

MONARCH® Blue Knight is Walters Gardens’ Buddleia selection ‘Blue Knight’ (USPP28,178). The [breeder profile](https://www.waltersgardens.com/variety.php?ID=BUDBL) describes mint-green leaves and long panicles opening lavender-purple before deepening to blue-purple; the [patent](https://patents.google.com/patent/USPP28178P2/en) records fragrant dark-purple flowers, a compact rounded mound, landscape uses, and the July 11, 2017 grant date. ## Siting Provide full sun. Walters Gardens lists zones 5–10, a 3.5–4 foot height, and a 6–6.5 foot spread. The patent identifies container culture as well as specimen and mass landscape use. Allow generous lateral room for the plant’s published spread. ## Maintenance Prune selectively to maintain the rounded form and remove winter-damaged stems when needed. In colder regions, wait until the risk of severe winter damage has passed before shaping.