I mean hide quality, meat quality, etc
something like Like
Fruit bearing = the amount of seeds you get from them.
Size = how much wood you get.
Growth speed = how fast they grow.
Quality bonus wood = % bonus to planks and blocks
Fruit food bonus = % bonus quality when making food out of the fruits.
Sap quality bonus (only for maple and birch)
The bonus could be +/-1 from the parent tree and only visible from growth 25% or higher, also an extra skill or credo should be required to view these qualities.
This would make tree farming so much more interesting.