Its a beautiful calamondin. There’s nothing wrong with it - seed grown citrus takes years to reach a blooming age. Dont prune it until it reaches it. Not sure what year that will be, i’ve read some who say they have gone from seed to fruit in only 3 years, and ive read some who have much older ones which havent bloomed yet. I’d say since its 5 years old that it is closer to sooner than later. i dont know if there is a way to speed it up. Your tree looks very healthy.

@calamondindave thanks for the info. l will continue caring for it and wait fornit to mature.

Just be glad you weren't trying to get orange or grapefruit to bear from seed. Those can take 10 to 20 years or more! This long juvenile period in citrus is one reason why most are grafted or rooted from mature cuttings.

I grew a calamondin from seed (in-ground) and it was 16-20ft tall before it began blooming. It took probably close to ten years....maybe a few over that. If my tree was any indicator, you may not have enough root space in a pot for your tree to reach fruiting stage. Fruiting maturity is measured by how many leaf nodes a tree has, not by how old the tree is. Your nursery tree was made by cutting a branch off of a tree that had reached fruiting maturity and grafting that mature wood on some kind of root stock.