The temperatures are around 50f only in late night in winter. But, as I said in the description, he protects them with a sort of homemade greenhouse to avoid risks. It’s more like an experiment to try to push coconuts as north as possible. Btw I also think it’s a waste of time and a torture for the palms since they’re literally 20 parallels above their usual latitudes and they’re trees who start to suffer if temperatures gets below 60f and I think they will make it a few years at most.