I have a small Lucs in the ground 4 years or so. It is just below 3 feet tall and is holding its first fruit.
It is a small tree (old, enough to hold fruit, but really small) and I am surprised it is flowering and holding fruit. I have others, that are larger and planted about the same time but not doing much right now.
I will post a picture later.
I measured and it is a tad over 3 feet, about 37 inches.
It has some flowers and also the one fruit.