Monique may well have the answer. The white delphinium is a seedling and the
original blue parent died. Either way, if he wants blue delphiniums he will
have to plant them again, & this time don't let it go to seed.
Iris,
Central NY, Zone 5a, Sunset Zone 40
"If we see light at the end of the tunnel, It's the light of the oncoming
train."
Robert Lowell (1917-1977)