It must be frustrating to move to what seems like the ideal climate for this hobby only to find an even more exotic environment is required! I am surprised both by what thrives in my greenhouse and what refuses to grow at all.
- Your marang leaves look like mine. I think it is correct (assuming mine is). Sadly I think I will have to rip mine out next year. There's just no way it is going to reach fruiting size as a tip bearer unless I give it half the greenhouse. I guess I could try pruning it way back but I don't know how it will go.


- I'm also growing a butterscotch sapodilla even though I don't really like sapodilla, hah. The hype was really strong.
- I cannot get illama to grow for me, they always die while other annonas grow well.
- Soursop has been easy for me, though it has only produced one fruit so far. It is blooming right now I will have to try hand-pollinating.

- I had a rollinia in-ground in the greenhouse too and it seemed to have the same shallow root system you describe of your soursop. It fell over from its own weight once - without any wind at all.
- I had some durian seedlings about 2ft tall for a while some years back, but my subsequent attempts they all died almost immediately. I think my greenhouse was more humid back then. My mangosteen was much healthier then also.
- I have a mammea american seedling growing in a pot that has always been super healthy. I figure I will have to ditch it before it reaches fruiting size, though. I think it needs to get big to fruit?
(this photo is from 9 months ago):

- I haven't been able to get pulasan to grow at all, I think a couple leaves at most before they die.
- I had a really healthy pedalai, but I got rid of it after it was a few feet tall because I realized how big they need to be to fruit.