Your 3 trees look very nice. You will probably have to give them support when they go outside. All four of my kumquat trees are held up by a metal rod after 17 months. Kumquats are leggy. The trees will have to be acclimated to sunlight and be placed in a wind sheltered position. Bring them inside on windy days. What Zone are you. Do you know the rootstock.

Are they still in original pot? Those are tiny, and have got to be hard to maintain proper watering. I potted mine up right away.

Still waiting for mine to flower or fruit, got it 2.5 yrs ago. I fertilize twice a month, less during winter.

they are fine, you get what you pay for nd sometimes you want a healthy younging and these are younger trees, if you want a premium, buy a premium, Logees is not

As stated by others, report in a quality soil and quality pot