how can you encourage flowers as my one has onley a few
By Grahan
United Kingdom 
on a west facing wall third year is now about 5ft tall pruned every year
On plant
sambucas negra (black lace)
27 May, 2009
Answers
Early Spring, hard down to about 24"
27 May, 2009
When do you prune it? I would prune after flowering.
27 May, 2009