Last time I posted I mentioned my Lemon Meyer trees looked healthy. I spoke too soon dang it.

Two of three Lemon Meyer trees have new looking leaves which have turned lime / yellow. I also see limbs turning yellow. New leaves seem to be a light green / lime color.

I did a search in the forums and most I can really find talks about new leaves coming out yellow which may indicate be a sign of iron, zinc or magnesium deficiency but in my case my tree's limbs are also turning yellow.

A little history.

* I took it out of the greenhouse (just a popup greenhouse) about three weeks ago. My husband is wondering if it's sunburn.

* Trees are in a 17"w x 13"d plastic pot and it's outside on my back patio, receives at least full sun for 8hours + a day. Back patio is open to the south - west sun.

* Temperatures have been around 75 -84 degrees the last few weeks

* The first day I took it out I did flush the tree/pot with water using a water hose.

* I recently removed the top layer of soil and replaced it with Miracle Grow Cactus , Palm and Citrus - Potted Plant Mix.

* Drainage seems to be good. If memory serves me right the water will start to run out of the pot within a matter of 2- 3 minutes when I water with my water hose



* I didn't see any bugs, webs etc on my trees.

* I have given it some bloodmeal and Epsom salt prior to changing the soil and a little more after I changed the soil. I have yet to find Osmocot citrus fertilizer but that's next.

* I've water once a week.

* Trees were a bit neglected during the winter. Besides water, nothing much else was done.

* I have a new water softner installed last year - it uses potassium and not salt but I'm told outside water by passes the water softner.

* I have three Lemon Meyers, two Kumquats and one Lemon-quat and only my Lemon Meyers are starting to turn yellow and only two of them.

> These two Lemon Meyers receive more sun then the third and are "tree like" vs. the third which is more bush like.

* The two Lemon Meyers are growing lots of new leaves but they look light green and have lots of flowers




Pictures
I have a few pictures but I realized they didn't turn out too well. It was pretty windy when I took them so I can try again but here are some of the better ones.








Thanks for help!

Use the img tag instead of the url tag for images & your photos will show.

Thanks. My thinking originally was they were really big so I didn't want to take up someone's band width.

Looks like you need a heavy dose of fertilizer.

You should be able to find Osmocote anywhere, even walmart...

Blah so I have been told here but I haven't seen the citrus version anywhere. Not in Amazon, Homedepot, Lowes, Wal-mart etc. I have gone to the stores here and looked on their websites so not sure why I'm missing it.

I found Espoma Citrus Tone on Amazon however and bought it there. Just a side note Homedepot has Espoma Citrus Tone available only online according to their website.

It looks like your tree has twig die back. Unfortunately, twig die back is more or less a common problem with container citrus trees. The below and above portion of a citrus tree forms a unit. The problem when a twig dies back is usually with the roots. Also, some small twig die back is a method used by the tree to keep both parts in balance. Sorry to tell you the branches will completely die. I would slip the tree out of the container and examine the root system.- millet (283 BO-)

I've had the same problem with some of my potted citrus. I have a large Hamlin in a 30gal pot that has a lot of twig die back this spring. When I bumped my smaller stuff up to larger containers I noticed a lot of them had roots that had died.

Millet, Why do the roots die back in pots? Are the roots more susceptible to freeze damage than the foliage? I know my greenhouse got below freezing sometime because my lime tree lost some foliage.

The tree's roots can have three possible colors. White root tips indicated recent new growth, which of course is good. Light tan roots are older mature roots, which is also good. Dark brown mushy, or dark brown flat roots are roots that have rotted. Also, while the tree is out of the container, look to see if the tree has roots growing in all portions of the container. When the ray's of the sun shines directly on the side of a container, especially with dark containers, the temperature of the medium can quickly raise to well over 100F. A couple years ago, I tested the temperature rise in a black container that I placed in the direct sun. In just 10 minutes the medium close to the side of the container facing the sun rose to 112F, in a half hour the temperature was over 132F. Temperatures near and above 120F will easily kill the roots on the sunny side of the container. - Millet (176 BO-)

Yes, remove any roots that are rotted. I hesitate giving you any advice about removing all the soil. If not done carefully or properly, doing so can cause a lot of trouble. Personally, over the years with all my trees, which are growing in Air Root Pruning containers, and in the high root zone oxygen type of medium I use, I have yet to change any of the medium. I'm certainly not saying adding new medium is not a good idea, I am only saying I have never done it. - Millet (275 BO-)