I fruited a Sugarloaf (E4) seedling. See page 8 of this thread. Last year was the first year it fruited so I need to evaluate it some more but so far it seems like it’s a clone of the actual E4 with some very minor differences which may be attributed to the rootstock or environmental factors.
In my review, I compared the real E4 Fruit, which is grafted to my multigraft Turpentine rootstock tree to my Seedling E4 fruit that was grown and fruited on my E4 seedling tree. My multigraft E4 tree is in full sun but the graft is towards the lower branches so the leave’s around the graft don’t get as much sun as my E4 Seedling tree. My E4 seedling tree is right next to a fence and gets a lot of shading because the fence is South facing but the fruit were in the upper canopy of the tree where it got decent Sunlight which may explain why the real E4 skin color stayed green whereas my Seedlings E4 skin color changed to a mottled Yellow/brown. My E4 seedling fruit may have also been slightly sun burned.
Either way, I’m super happy with the fruit from my E4 seedling because it’s a relatively vigorous grower and its blooms are disease resistant.
I have two other E4 seedlings which should fruit this year or next. I would highly recommend people in Southern California try growing out some E4 seedlings.
Simon
Where can you get an E4 here in San Diego?
That's a real challenge, I think most of the people who grow it in SD are grafting scions from Florida onto established rootstock trees in the ground.
Since it's poly your best bet is to acquire seed and go from there.
The seeds are often aborted in this variety, so if you find someone selling seed, make sure they open the husk.