I have a bunya pine and am starting to plant seeds around the farm, but I can find very little information on how to do this . . other than to make sure it can get the tap root down (which I think is ok as I’m mostly planting where I wouldn’t need to move them)
To be honest there’s a gaping hole in the research. We really don’t know that much about them. Take the Wollemi (Wollemia nobilis) for instance. It’s been mass marketed to the public but by asexual propagation (cuttings) with extremely mixed results. Research bodies are only just now starting to do more thorough work with seedlings and asking more questions. Do other Araucariaceae have this tuber-producing habit? What is its true purpose? Do other species’ tubers hold potential value as food? There’s a whole undiscovered world underneath these trees. It’s interesting — fun — this kind of research and observing how large and powerful a Bunya Pine can get. They can be so unpredictable. One day you throw a Bunya nut in the compost and see nothing for six months then suddenly there’s a nine inch tap root poking out. Obviously it had stalled, waiting for optimum conditions but as to what those parameters are, we’re still unsure.
So I’m following the instructions there e.g. ‘place on the ground and cover with simulated forest litter’, but also experimenting a little with whether to place them flat, pointy end down, pointy end up etc, with and without seed husks on . . etc!