Q.Dwarf Lime Tree Care
Foot tall lime tree originally shipped w/2 marble sized limes last summer, is not growing. In trying to motivate it, tried transplanting just now & the roots are almost non existent (over watered?), but even though there are 2 new limes coming on, the “tree” itself is not growing.
Certified GKH Gardening Expert
I don't recommend sizing up to that large of a pot this early. This will make it very likely to be overwatered in the near future. It would not be a good idea to dig it back up at this point, but until the root zone fills out the entire container it will be necessary to carefully monitor the watering situation.
Make sure that the container allows water to leave the bottom. Also make sure to allow the soil to dry out, thoroughly, down to about 3 or 4 inches between waterings.
As far as slow growth goes- You will need to apply a citrus fertilizer according, to packaging instructions, for proper growth.
DOLOMITIC LIME and IRON SULFATE will be an appropriate treatment, once or twice per year, to keep infections at bay.
Here is an article that will help you with the care of lime in container: https://www.gardeningknowhow.com/edible/fruits/lime/potted-lime-trees.htm