No It is fine. The leaves start out light green and if the roots and plant are warm they need more light or the grow bigger leaves.

Steve

Prune it, or not. Depends on your goal. If just a foliage plant, prune back long shoots for a more compact plant.

If you ever want fruit however, you'll need to let it grow without pruning. It will likely need to get about 5 or 6 feet high (or more) before the growth can undergo the 'phase change' to mature growth that is capable of blooming. Right now it's still in 'vegetative phase'. Lemons can take from 5 to 10 years (or more) before they are large enough and old enough to bloom, depending on climate, season length and growing conditions. Too many variables to say for sure.

Assuming you set this outdoors in summer?

Interesting, great I'll just let it go nuts. Yes outside for as many months as it can then back inside for about equal length. I'll just keep it fed and tanning as long as I can. I'm moving it into its last and larger pot this spring, most likely the last one otherwise I won't be able to easily move it any longer. Leaves smell really great, very lemony 😁