An unusual species native to parts of China, Buddleja alternifolia has arching branches covered with masses of fragrant, lilac coloured flowers in early to mid summer
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A popular garden plant, Buddleja davidii 'Black Knight' has lovely long trusses of fragrant, dark purple flowers in late summer
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A compact cultivar, Buddleja davidii 'Nanho Blue' has arching branches with spikes of fragrant, pale lilac-blue flowers in summer and lance-shaped, pale grey-green leaves
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