Why did my lime tree stop growing?

Question

I have a lime tree inside behind the window in a pot. It's got a couple of fruits on it and it seemed to happily grow new foliage up until about 1 month (or so) ago. I also stopped watering it a few days ago as I thought it wasn't as thirsty anymore i.e. the soil would stay moist and not dry out. What could be the problem here? When I shake it, it doesn't drop any leaves. but also it doesn't have a whole lot of foliage on it...

The leaves on the bottom are rather new and on the branch on the left side, you can see a fruit, the largest on the tree (there's three smaller ones), too.

I tried to take another picture to give you some better context but it's difficult as it's nice and sunny out.

EDIT1
When watering it, I've been using a fertilizer that contains:

• Nitrogen
• Available Phosphoric Acid
• Soluble Potash
• Iron
• Manganese
• Zinc
• EDTA

Is that okay, should I keep using it or use just water or a different fertilizer?

Answer 1

This plant is growing under low light conditions and it has a typical nutrient deficiency. Chances are good the water you are using is alkaline and this has helped to change the pH of the soil so that the Iron and Manganese are no longer available. See here and here and here for details. You can deal with these issues by:

• repotting with a tropical plant soil less mix
• fertilize at quarter strength with a citrus fertilizer every other week for a few months
• cut the plant down to a strong leader to encourage tree like growth
• move to a much higher light situation and watch for spider mites

I see that you are using a fertilizer with a chelating agent, EDTA, so I am surprised to see the nutrient deficiency indicated by the veining on the leaves. (Dark veins, light green leaf). If you can find a fertilizer specifically for citrus which can be heavy feeders you should use that.