When To Prune Buddleia: Buddleia 'davidii' blooms on the new
wood of the season and should be pruned in late winter /early
spring to encourage new growth. Prune before new growth starts
to appear to approximately 12 inches (30 centimeters) above the
ground. Buddleia are a type of plant that highly benefit from a
severe pruning. "Hard" pruning Butterfly Bush promotes many new
arching branches with larger flowers than if the plant had not
been pruned. Later in the Season Pruning: It is also beneficial
to prune off dead and faded flowers once the flowering season
has completed. With regular "deadheading" or removal of spent
flowers your Buddleia will put its energy back into producing
even more flowers well into fall. In colder climates, never
prune completely to the ground in Fall for it can be detrimental
to the plant. It is best to wait until late winter/early spring
to perform this task. Retaining Height of Buddleia: If you chose
to use your Buddleia as a backdrop shrub simply allow it to grow
larger then pr