I have one of these (HA):

Jeanie

I had a sagaurro at one time my inlaws live in Tusan
and gave me a baby about 15" around and 5" tall.
Don't know if thats legal or not. Had it for 4yrs
and I think it might have grown 16th of an inch.
I knew I would never live long enough to see its
greatness so I gave it to my daughter when she
moved out.

I think it takes 60+ years to grow one of the arms.

My mom dug up a pear cactus and planted it in the
yard. I would water it all summer and it loved it.
It got about 4' high by 10' long Huge yellow flowers
every year.
TREE

I was afraid they were slow growers! No telling how old this specimen is!
Guess I will never have one, unless I move to the desert.

Jeanie

Jeanie,

If you just stay there, I think the desert is creeping towards you, one inch at a time.

Dawn

L. O. L. , Dawn!
What is scary is I think your prediction is right on target! The morning ushered in clouds, while I was standing there hand watering pots and "difficult to reach" areas, dropped the (what is now normal) three drops of moisture and moved on.

Jeanie