Dave, I'm not sure about my soil composition. I don't think this mamey has a micronutrient problem, because I have been fertilizing it. Other Pouterias are doing fine.
JF, everything is doing fine but this damn mamey. I will give it another year, but in the meantime I will plant out a few others
Yes, guanabana does fruit here, in fact I have a bigger speciment producing.
Nullzy, I mulch whenever I get organic stuff. Two years ago I ordered a whole truck. I think it's time to do it again. See a pic from a chirimoya after mulching:
Harry, Sergio is right. I have three seedlings in ground which came from seeds Oscar sold me. The research station in Tenerife has also three seedlings from the same age, but the seeds came from Honduras. So there is no fruiting specimen in Canary Islands that I know of. By the way, none of the GS grafts did take
Here is a recent picture of the trees in the research station (they do not prone them, but I did):
Steven, the rootstock is a Pantin seedling