you can’t grow your pot where it can been seen by the public or from any adjacent property even. so that would probably rule it out at communal or side by side gardens.
Publicly accessible is the key phrase, I believe. So if you can see the offending plant from, say, the library, then that's a no no. But if you can see it from your bedroom window, then it's OK (so long as you don't consider your bedroom a publicly accessible place). The regulation goes further to say that visibility has to be unaided, except eyeglasses, i.e. no binos or drones or elaborate mirror set-ups.