Exbury holds the national collection of Nyssa (Tupelo) and Oxydendrum under the NCCPG National Plant Collection scheme run by the National Council for the Conservation of Plants and Gardens.
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David Stuart, former curator of the NCCPG national collection of Buddleja at Longstock Park Nursery, England, rated 'Opera' third in the pink Buddleja league, behind 'Pink Delight' and 'Border Beauty'.
A specimen is grown at the Longstock Park Nursery as part of the NCCPG national collection of Buddleja.
A specimen is grown as part of the NCCPG national collection held by Longstock Park Nursery in the UK.
A specimen is grown as part of the NCCPG national buddleja collection held by Longstock Park Nursery in the UK.