So over a year ago I planted four young cold-hardy avocado plants at my 9a (or perhaps 8b) north-central location. All four were killed in the hard freeze this past january. There does not appear to be any sprouting even from the roots, which is surprising to me. Even banana roots easily survive such cold-snaps.
Question is, if these supposedly cold-hardy varieties can be nursed along to a good size, will they survive such freezes (24 degrees over 4 hrs)? There is a large thriving avocado tree at the lake county gardens. Of course, that site might be a half-zone milder than mine.