Because desert gardens are not the norm, it's not always easy to find good resource material. I'm always looking for what is basic information elsewhere, seeing how it translates to the environment I now find myself working in.
Pruning, for instance. We have two bloom seasons here. Spring is the obvious one, but we are in the middle of the second bloom season. Fall, or post-monsoon, is when the plants that have caught some water, or just benefited from the additional humidity of those months, let out with blooms, often the second flush of the year.
And we don't, as a norm, get any freezing temperatures. So while there are plants, like many of the trees, that are currently dropping their leaves for winter (quietly, a few at a time, going soft yellow and falling to the ground - almost unnoticeable until one sees the yellow drifts of tiny palo verde leaves on the stones and sidewalks) there is no definite marker for 'now' being the time to prune.
When is that 'now'? Luckily I found an article online for this very information.
It's from az.central.com, and I've reposted the critical parts here for my records: