Hi,
Having for now less than 20 trees and strains I can keep that information in my head.
I have that information as well on photos ... just in case ...
Of course, for someone having a hundred trees and making cuttings on the run, planting them in ground just like that... Ok I think that that one needs an easy way to help his memory .
Labeling the trees like you do would worry me, because I have a garden from the city - so more gardens around, and people passing by.
I guess that it would be very tempting in the long run for people to jump the fence and get the trees or cuttings - The label would help them choose ... And I don't want that.
If they are unlabelled, I guess they could take cuttings at one tree or take one tree but leave all the others as they all are just fig trees ...
My nearest fig tree to the fence is ... BT !!! - I starting planting them at the opposite of the door just to avoid those problems - BT is one of my last addition to the collection as until 4 years, BT were hard to find here .
For the stones, my daughter would fix that for me - "look dad, I gathered all the stones from your garden - they were so cute ..." and you can tell her a hundred times not to do so ...
Just a kid ... Just too funny . By the way, you don't have a cat or ? Cats probably can fix that as well .
I hope the wind won't take the pots to the ground or the stones would probably roll out of the pots and gather them selves for you :)