I have 2 cactus plants in my yard (Phoenix, AZ). They are different but both form tall columns (San Pedro/ Organ pipe).
The one that branches out farthest tends to droop half way down a column. Then it breaks at the bend or the whole arm breaks off. What can cause this. How do I fix it?
This question could best be answered by your local agricultural extension office. The only think I can think of is lack of water. Have they just been planted?