I find this to be an odd discussion. Are we saying that breadfruit and soursop are in the same league of cold hardiness? I grow both and I find that I notice immediate leaf damage on breadfruit in the low 50's, conversely, I have a soursop in a pot on my porch for 2 years and it didn't lose a leaf last winter or even winter before. Unprotected. I will say, that I have a 7' soursop in the ground and it was doing great buy seems to have hit a snag...not sure what happened yet but it is growing again. Thanks. Chris