Premise: Buddleja 'Pink Pagoda' (sold as in the USA) is a sterile hybrid cultivar raised in 1998 by Peter Moore, Chief Propagator at the Longstock Park Nursery in Hampshire, England, and named by Roy Lancaster. The cultivar is the result of a crossing of "Buddleja" 'Pink Delight' with "Buddleja × weyeriana" 'Golden Glow'. Plant Breeders' Rights were awarded in 2008.
Hypothesis: Buddleja 'Pink Pagoda' is cultivated from heirloom seeds.