| 'Blue Chip'|
| J C Raulston Arboretum, Raleigh, NC, USA.|
Buddleja 'Miss Ruby', Buddleja davidii 'Blue Hori, Buddleja 'Ellen's Blue', Buddleja 'Minpap' = Reve de, Buddleja davidii 'Empire B
Buddleja 'Blue Chip' (Lo & Behold series) is the world's first truly dwarf buddleja, raised by Dr Dennis Werner and Layne Snelling at the J C Raulston Arboretum, NCSU. The cultivar is the result of the complex hybrid B. weyeriana 'Honeycomb' × (B. davidii Nanho Purple × B. lindleyana). 'Blue Chip' was released to commerce in 2007 and patented in 2009 (USPP 19991).
In the 2008 Buddleja cultivar Euro-trial held by the Royal Horticultural Society at Wisley, the shrub was voted by the public as the second most attractive cultivar of the 97 on display.  
'Blue Chip' grows moderately quickly to a height of 1.0 m, forming a dense, rounded structure including numerous lateral branches. The inflorescences are small terminal panicles 8 cm in length comprising < 200 flowers, violet-blue with an orange corolla throat. The mature leaves are elliptic, < 9.6 cm long by 3.6 cm wide, green above and grey-green below. The shrub is male-sterile and female fertility is low, reducing random seeding to a minimum. The cultivar is claimed 'to attract butterflies in abundance' in North America.
'Blue Chip' is already widely cultivated in North America and Europe. Hardiness: USDA zones 5 - 7.
Buddleja Lo & Behold 'Blue Chip' Wikipedia