Q.8 Year Old Baby Sagauro Needs Help
I didn’t know what it was until about 6 months ago. It was struggling. now it has been knocked over and I find no roots and the bottom rotten. It is still struggling to live. can you help me? It is 6″ tall.

Certified GKH Gardening Expert
I suggest cutting off the rotten part with sterile tools and replant in fresh soil. Hopefully it will root.
https://www.gardeningknowhow.com/ornamental/cacti-succulents/saguaro/saguaro-cactus-care.htm
https://www.gardeningknowhow.com/ornamental/cacti-succulents/scgen/cactus-going-soft.htm