I've posted in previous Casimiroa pringlei threads. Mine's been growing from seed in a pot from August 2019 - March 2020. Planted in-ground that spring and protected with 30% shade cloth throughout the central Texas summers that go 100F+. Watered every 3 days. 2ft tall at the end of the season.
This winter, it was protected with a makeshift tent using a Planket cover. After the snowstorm, it looked perfectly fine for a few days, but its leaves then dried up and dropped like a common citrus tree as a response to frost. Bad frost crack near the trunk too. Since two weeks ago, it's been leafing out about 6in from the base. Only about an inch of dieback, but no buds on top yet. Pic attached. Painted the bark with IV Organics to deter pests from the frost crack. Hopefully only a few more seasons before I can start testing graft compatibility with white sapote.
Also, side note, but I'm wondering if the Pringle's Sapote going around our area is a misidentified
Casimiroa greggii and not the true
Casimiroa pringlei. Leaves and fruit are a perfect match for
greggii, not at all like
pringlei. Nothing major to be worried about since they're both from the same general region and the one being sourced out is proving to be cold hardy.