Hi Iwan,
Show us the leaves, as for now, my young Osborn just made leaves :) .
Surprisingly, the tree tried to make one breba that got slug beaten but no main crop at all . It did not grow that much.
The conditions were harsh last year here, and other strains in similar stage just behaved the same.
I'm looking forward to a better outcome this coming season .
If you post the leaves, I can compare yours to mine.