Freezing can be extreme in some parts of Lophophora’s range from time to time.
The images above are from populations in three different Chihuahuan Desert locations.
The plants shown experienced a cold spell that probably never saw the temperature rise much above -10蚓 (12蚌) for three days. We can really only guess as there was no actual temperature monitoring at the actual sites.
Many of those plants are going to live. Some will not. And a couple of them very clearly died. It is not always possible to tell immediately.
The plant below in South Texas experienced rain with a hard freeze earlier on the same morning of this photograph. It will be fine.
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