We've only had a few produced at camp, (trees are young) and they were picked by members. I can tell you the ripening time in central Pa. - zones 6 & 7 - is right around October 15th. That's when the u-pick orchards start to allow Crimson Topaz picking. I've picked Crimson Topaz at a nearby (to my home) orchard and there were a few apples on the ground the 3rd week of October - but most still on the tree. The orchard near my home location in SE Pa. was still picking Crimson Topaz around the 10th of November. CT are known to be a late apple, so I would expect hanging until at least the early part of December to be realistic. I haven't gone to that commercial orchard to check how late theirs hang - and the trees at camp have only had a couple apples on them so far. My camp is at the border of zones 5 & 6 - colder than my home area. That's the best info I have personally to this point in time.