That is very interesting Caroline.
As said, my contact with Himalayan blue poppies has been through a friend, David Tomlinson,
whose perennial gardening course at Merlin's Hollow (the garden he built) I initially took.
He really is an expert, not simply by reading but by raising the plants which he (and wife, Dierdre) sold, on open days,
for the materials with which he built Merlin's Hoillow.
He always has a showing of Blue Poppies, as said, some years better than others.
Going to be interesting to raise Calgary and your experiences with him.
