Removing Top Growth from a Tall Cactus

Can You Cut Off a New Arm Growing from the Apex?

A 6-foot cactus (possibly Mexican fence post or Peruvian torch) has a new offshoot at the top. Owner wants to remove it due to ceiling height.

Procedure

1. Use sharp, sterile knife (alcohol).
2. Make clean cut at base of offshoot.
3. If multiple cuts, sterilize between each.
4. Dust cuts with fungicide or Rootone.
5. Offshoot can be rooted: callous 2+ weeks, pot in soilless mix, no water until growth.

Note

Photo would help ID. Removing apical growth may encourage branching below.