So if you place them with the RAM editor, the game won't reject them? They'll stay and keep producing perfect fruit?
Personally, if you want perfect fruit to resell, you have a bottomless basket of each perfect fruit in the editor that you can just keep in your inventory/locker. I personally find this more convenient that harvesting trees manually but I'm lazy.
These will give you a basket of fruit with (0) as the number, but you're going to have the "Grab 1" option anyway. Just don't combine the fruits back into the (0) basket because it's going to turn it into a normal basket.
I used the trees in the editor for *aesthetics* only. Like, for my farm town, I am planning to make an orchard. However, since I don't have an ordinance in that town yet (gdi, development permit), I'm not time-travelling there yet! So, I can't go and check for you.
Like I said, you can't have more than one town fruit at once (the town fruit is a one-byte value) so you can't have ALL OF THE FRUIT as your town fruit at the same time (plus it would glitch Isabelle's dialogue)