I got them this spring, so I can't say for sure whether they got chill hours last winter, but I'm pretty confident they did. That one was the biggest and had tiny buds on it, which opened after I planted it. The weather's been cooling off so I think the trees are less stressed, and I did just give them a thin layer of chicken manure, so I can understand why it might seem like a good time to flower if I were a tree, but I didn't think it could just flower whenever. Also it's on this year's growth, so technically this section of the tree didn't get chill hours. Or maybe it doesn't work that way. I don't think I'll get to see if it can hold fruit over the winter though, since this is the only one flowering.