Key Lime seems to have stopped growing
About a month ago I bought a key lime in a pot. At the time it had a few flowers on it and quite a few leaves/small branches. I potted up the plant into a 12" pot (1/3 to 1/2 a size bigger than the pot it was in) using premium quality well draining potting mix. Since then the lime has made no changes. I expected that with the extra room the lime would expand it's root system and at the same time sprout a few new shoots or even grow the single tiny fruit on it but even that is still the same size it was when the flower petals dropped. I don't know if it has grown new roots nor not, I obviously can't tell that without disturbing it. It's not lacking in water, sunshine or heat (days are already up to and above 35C and it's only second month of spring).
The same time I bought the lime I also about a Meyer lemon and an imperial mandarin which were both treated the same (except the mandarin is in a larger pot) and are both growing beautiful new shoots and budding and actively growing the fruit on them.
Is there something wrong with the lime? I know they can be slow but no change at all seems a bit odd considering it should be really happy. The leaves it has on it look fine and healthy and there is no insect issues. It seems perfectly healthy, just not growing.
Is there anything I can do to jump start new growth? I would really appreciate any comments or information (or even criticism!) on this.