I have a Fuji apple that I grown from seed. It does produce flower and apple. The apple was the size of the cherry the first year of fruiting. It's yellow and orange in color and tasted sweet. The fire blight got to the tree and I have to prune some of the branches including the top leader. It does fruit the 2nd year of fruiting, but all the fruits dropped during summer. It does not grown that much from spring to summer. In fall, it came back stronger. Now there are 3 leaders including the sugar sprout that grown from the lower branch. The sugar sprout branch was as big as the other 2 leaders. If they wanted to compete, I'll let them. Amazing sugar sprout considering that it has grown that big in less than a year. It's a crab apple? Likely, consider the size of the fruit. Regardless, it has some amazing green. The flowers turned pink to red and eventually turned white on full bloom.
