Not all do...for instance, Kampong Mauve must be grafted.
The seedling Kampong Mauve can end up green if other green sugar apples pollinated the Kampong Mauve.
Did the KM produce all green fruit or green and red fruit and did it change the following years?
I have 4 types of red sugar apples and all 4 grew true from seed. Two are easy peal and
two are not and this trait also grows true. None of my trees have ever produced an unusual
colored fruit and I had hundreds the past few years. Even though I don't hand pollinate the
trees are in close proximity.
If anyone has KM seeds this year I will trade you for any of my seeds and I will grow some out
and see what I get. I could even hand pollinate with green sugar apple pollen