But, then I'd have to replumb the things onto their "correct" zones, later. E.g., the citrus trees have very different watering needs than the roses (the former needs *long*, deep waterings once or twice a week; the latter needs brief waterings daily -- twice daily when we have hot/dry winds!). Likewise, the cacti don't like much water at all!
Much of the complexity of the water distribution, here, is because we decided *not* to group plants of similar water needs in close proximity, etc. (there's a mile of 1/2" poly buried on this little lot!)
Yeah, but then I have to remember to turn it on to begin with and off when done (that's the point of having these little "buttons" -- "give me some water and please turn things off when I forget to, later" :> )
If I had been more ambitious, I would have run two lines around the yard -- one "switched" (valved?) and the other "unswitched". The effort to trench for one line is pretty much the same as for *two* lines! But, the pisser would have been all the plumbing to get that second line under the four walls it must pass by :-/ Easier to let "technology" solve the problem! ;-)