Q.Cactus Looks Bad
I live in Florida for 4 years now. Have had my Monstrous Cactus outside. I was away for a couple of months and when came home the cactus had all this sandy colored stuff all over it and I dont know what to do. I have had this plant for 40 years

GKH_Susan
Certified GKH Gardening Expert
Certified GKH Gardening Expert
Answered on October 23, 2021
It could be cactus scab. Did someone water while you were away? Check its cultivation routine. This article should help:
https://www.gardeningknowhow.com/ornamental/cacti-succulents/scgen/cactus-scab-treatment.htm
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