Origin
Buddleja davidii 'Empire Blue' is a cultivar belonging to the Buddleja davidii species. Buddleja davidii is originally native to China. 'Empire Blue' was developed through selection in breeding programmes for ornamental value. This cultivar is often used in gardens and public green spaces.

Characteristics
Buddleja davidii 'Empire Blue' is a deciduous shrub that can reach a height of about 2 to 3 metres. The plant is characterised by long, narrow panicles with violet-blue flowers. Flowering occurs in the summer months, typically from July to September. The leaves are narrow, lance-shaped, and grey-green in colour. This cultivar is known for its strong attraction to butterflies.

Care
Buddleja davidii 'Empire Blue' requires a position in full sun. The plant grows best in well-drained, fertile soil. Pruning annually encourages a compact shape and abundant flowering. The shrub has moderate winter hardiness and tolerates brief periods of frost. Regular feeding supports growth and flowering.