The Tropical Fruit Forum

You could always use the 4 X 8 silver sided sheets of polyurethane on three of the sides of your enclosures instead of plastic sheets..  These are sold at Home Depot.

Sour orange was the go to rootstock until Tristazia various struck.  If you live in an area without the disease Sour Orange is an outstanding rootstock.  I have an inground Sour Orange tree, so I am able to get all the seed I can ever use.

Eventually you will need to build a screened structure over the tree to protect it when it becomes larger.  Psyllids can infect the tree at any stage of growth, especially venerable during flushes of new growth.

Doesn't look like sun damage to me.  Looks more like insect damage.

Manganese deficiency symptoms frequently show up on new growth, then generally fade away as the leaf matures.  This is due to the rapid growth of new leaves, and the sparse amount of manganese in the soil. Therefore it takes time for the manganese deficiency level to fill up.  In citrus a manganese leaf deficiency is shown as a yellowish leaf with green veins WITH green borders on the sides of the veins.

Besides the leaf miner damage, the tree looks to have a nutrition deficiency.  Iron and or Manganese.

First, the tree started out wrong.  When planting a citrus tree one should only  dig a hole large enough for the tree fit into.  Then back fill should be only the dirt that was removed when the hole was dug.  I agree with 1rainman that the tree has HLB.  You need to consult your county agricultural department right away.

:Large commercial nurseries crush the fruit under water string the resulting mixture with pectinase and warm  temperatures to separate the seed from the pulp  and washing out the seed.  The washed seed is surface sterilized with 125F water for 10 minutes, dipped in 1% Hydroxyquinoline sulfate, air dried on screens in the shade, and packaged in plastic bags, When storing, it is important to leave these storage bags open initially until the seed equilibrate with the refrigeration temperature, Fresh seed can be stored at 40-F for as long as 6 months.

edweather, when you say our tree is a few years of age.  I take that to mean the tree is 2 years old.  Most citrus varieties do not produce quality fruit until at least 5 years old at the earliest  As the saying goes...... Good things come to those who wait..

Would be easy enough to find out by planting numerous seeds, and see if you only get one seedling, or multiple seedlings peer seed.

Your Xie Shan looks ready.  Pick one and test it.

I agree with W,. straight Miracle Grow is NOT a good growing medium for container citrus trees. 

The Chandler tree I once had produced pink fruit.  During the winter months my heater is set to turn on when the greenhouse temperature falls to 40 degrees F.