Posted: 26/05/2014 at 16:00
It does look a bit sorry for itself - can you see all that greening on the soil around it? That indicates that the soil is damp and sour with not enough air in it.
I would lift that shrub and replant - first preparing another planting site by digging in a generous helping of organic matter - multi-purpose compost would be fine, and a generous helping of horticultural grit. The grit will help improve the drainage in that area. Dig that in over an area of about a square metre, and then plant your buddleja in the middle of it.
When you plant it water it in once, say a small prayer and then ignore it for at least a month - in a month's time, if the soil is dry an inch below the surface give it half a bucket of water and leave it another month, and repeat until the autumn.