Expert: Joan - 3/2/2009

Question
QUESTION: We have had an Argentine Giant in our yard for 5 years. Just a few days ago I noticed that it is splitting. Do you know what could be causing this? Thank you! Tom

ANSWER: Hello Tom,
I don't know what you mean about the cactus splitting. May you describe or send me a photograph? Thanks.

---------- FOLLOW-UP ----------

QUESTION: Its a vertical split between the ribs of the Argentine Giant.  Thank you

Answer
Hello Tom,
It may have been cause by symmetrical arm growth. Does the cactus have arms growing opposite of each other? These cactus don't usually grow arms, but some do. If it does, you might want to prune it and use the cuttings to propagate. Another possibility is that it may have internal hollow damage. Perhaps a pest or infection has destroyed the inside, causing it to dry internally. I can't guarantee you this is the cause though. If you'd like accurate answers, you could consider attaching an image.

Your recent review states that the species don't grow arms. Yes they do. If there are multiple stems linking to the same base, they are considered arms. I'm an expert (obviously) here on cacti, but if you feel inconfident, consider researching my advices. Thanks and good growing!