If my Julie seedling "juicy Lucy" is any indicator, it bloomed and fruited heavily the first year after having the tap root cut from moving it to the ground and all of the grafts I made from cuttings on to rootstock bloomed the first year. I don't know of I can attribute it to the Excalibur fertilizer, good soil, the genes of the Julie or a combination of the three.
Does Juicy Lucy taste like Julie? I got some budwood from you a couple of years ago. It bloomed for the first time this year and is holding on to a number of mangoes. Mid season mango?
My Julie seedling (Juicy Lucy) has fruit on it till mid / late July. I haven't tasted a "real" Julie either grown in Florida or Jamaica so I cannot say if it is similar in taste.
I can say this, at some times the fruit is better than others, possibly because of a ripening window? Also some fruits have a HUGE proboscis, so big that passersby steal the fruit when they see one.
For informational purposes. In 2012 when I went to pick up Juicy Lucy it was in a decrepit wooden barrel on a salt water canal. We had to break the tap root and smash the barrel to extricate it, and many roots were destroyed and it did not experience any die back or even leaf drop :-)
At that time it had a black something or other on the bark like a burn from a fire, the leaves, the branches and fruit never showed any issues since getting it or planting it in 2012.
As a prophylactic measure upon planting it just in case it was some kind of mold I sprayed copper and later on Organocide on the trunk, and almost as if it were a burn mark the trunk has continued to grow showing clear clean new bark between the parts that appeared to be burned. I have not sprayed anything on it since the planting it and it has remained clear of any typical Julie issues. It currently stands at around 11-12 feet tall and has never been pruned.
I gave away several grafted trees, all (AFAIK) have bloomed including one grafted one I have left in my yard if anyone wants it they are welcome to it.