
GKH_Susan
Certified GKH Gardening Expert
Certified GKH Gardening Expert
Answered on October 26, 2022
Make sure it isn't being overwatered. Sunscald could be an issue. Here are some possibilities:
https://www.gardeningknowhow.com/ornamental/cacti-succulents/scgen/treating-cactus-sunscald.htm
https://www.gardeningknowhow.com/ornamental/cacti-succulents/barrel-cactus/pythium-rot-in-barrel-cactus.htm
https://plants.ces.ncsu.edu/plants/echinocactus/
https://pss.uvm.edu/pss123/cacechin.html
https://hgic.clemson.edu/factsheet/indoor-cacti/
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