Thanks, Hannah for your reply. You’re obviously more experienced than I am and those are great statistics indeed.  Please do let me know how those rockii seedlings perform. And I’m also a curious what you’re planning to do with all those rockii seedlings. It amounts to quite a big plot of land when they mature, do you have that amount of space (I think I saw somewhere you also have quite a lot of P. delavayii) or do you plan to make a selection early on? In the first case: I’m jealous and in the second case: what will you base your choices on?