Some of my Calamondin Orange leaves are going yellow and it don't know why, during the winter i put it in a little greenhouse in my house and now i am starting to take it outside. The leaves are going yellow the ones going yellow are the new gowth leaves that grew in the greenhouse. Here are some pics of the leaves

Heres one of the yellow ones.


Heres is a normal green one.

while the focus of the pictures is not quite sharp enough to be sure, I suspect iron deficiency -- can you see green veins on an otherwise yellow leaf? That's the "clue" to iron deficiency.

If it is iron, there are three possible causes:

1. lack of iron in the potting medium. Does your fertilizer (or micronutrient mix) contain Fe?

2. too-high pH of the medium. If your soil pH is much above 7, this is the more likely problem. An acid-forming fertilizer will solve this problem.

3. Damage to the roots (from flooding, drought, cutting, or other cause). This seems less likely, since the lower leaves look good in the photos, but can be another source of apparent Fe deficiency.

I tested the soils ph and it is around 5.5 and 6.0 and i haven't been fertilizing it because i transplanted it about 2, 3 weeks ago i didn't know if it was to soon. And my fertilizer has 0.15% iron.

I fertilized my plant about week and a half ago and it looks a little better but some of the leaves are still yellowish should i just keep watering?