Cactus have such shallow roots. Sadly, they are best when rooted as as 'cactuling', I marvel at how they support themselves. Is it Possable to save it? I do hope you plant one of its arms. In 50 years

it will be magnificent.
We have had here in Phoenix about 1.24 inch of rain, fantastic. That is about 1,100 gal. of collect able water off my roof. That is a lot of water, I wish I could capture all of it. The desert gets/needs 9 inches on average. That would be over 7,000 gal in a year, if I could collect 8" of it. For a family of 5, between 3