apricots not setting fruit
I planted a Harglow apricot 5 years ago where I am in North Carolina and my mother-in-law in lower Michigan planted an apricot 8-10 years ago, and neither of them has set fruit yet even though they bloomed fairly early on. What do you all think could be going on? Do apricots need cross-pollination? Can they do without but do better with? Are they just super sensitive to late frosts (even the less severe years where other fruit trees don't seem bothered)?