It is a lack of nutrients. But what is causing it?

The wrong pH? Wrong fertilizer? Rotted roots? lack of oxygen to the roots? Too much sun heat?

I would check the roots first and make sure the soil is not staying wet too long to prevent them from breathing or rotting. I would also make sure the soil is not holding soluble salts that kill the finer roots. So. a mix and root check first)

Silica and a few others here might be able to narrow it down. I hope they see this) They should soon.

The leaf patters are showing a nitrogen deficiency, Nitrogen is available at a pH anywhere from 4 to 9,, so If you are fertilizing the same as your other trees there should be enough nitrogen. The problem could be as Meyermike pointed out in the above post. How long has this tree been in the same container? What is the fertilizer that you feed to the tree? Slip the tree out of the container and examine the roots. We will wait until you report back.

thanks for your help. I purchased this with 3 others from Lowe’s mid June and repotted within a week. I put them in galvanized steel pots. I used the miracle grow fertilizer for tomato, fruit and veg 10-5-15 around end of June because I couldn’t find any citrus specific fertilizer. I purchased epsoma citrus liquid feed a few weeks later because early July it was already yellowing and had leaf pattern changes. I’ve been researching about yellowing and thought the liquid would boost the nitrogen.

I’ve used the liquid fertilizer per directions with water and feed every 2-3 weeks. I mix liquid 2 doses with Proper water and spread amongst 3 trees so maybe it hasn’t been exact.

Question : Did You notice the leaves are malformed, they aren’t symmetrical like my other trees. The other thing I can’t figure out is the yellowing started on lower leaves and is extending upwards. The upper leaves are still green. would that be normal if it was a nutrient deficient?

i will try and pick up a ph meter or test Kit this weekend first and see if that could be the reason. Id hate to pull this tree out of pot and stress it more, plus I have no clue what to look for. can You point me to good website or even video that shows how to differentiate good root and bad root. And might have good techniques on pulling this out of soil

Rene, I notice you mention that your trees are planted in galvanized steel containers? I might look there first. Galvanized steel is coated in a zinc and other mineral oxides in order to protect it from rust. In alkaline soils, this isn't a problem, as you won't have much leeching from reactions. However, citrus is often grown in a mildly acidic mix, this can react with the coating and leech minerals into your soils that wouldn't usually be there. This can translate to a buildup of salts in your soil and can kill the feeder roots, resulting in what would appear to be a nitrogen deficiency. (This is part of why they usually recommend you don't grow things like blueberries or azaleas in galvanized steel). If you want to keep them in that pot I might suggest lining it with something so that the soil isn't in direct contact with the metal.

Hey Rene. Do you have drainage holes in those containers? I have had this issue with my cara cara in the ground in my greenhouse. All the other citrus around it are fine. I too am in ontario. I can vouch for it not being from cool temps LOL (30-35C) (86-95F) everyday since June. I have fertilized too and no improvement..

I was able to do a ph test might not be too accurate but seemed ok.

I wanted to show a pic of my run off I do have holes in the bottom as well as a layer of rocks in the bottom. But to me this run off does seem salty.