Wow. You're gettin' quite Technical with the chemical stuff there, Silica.

OK, I think you intend for the Fix mixture to be Sprayed on the leaves?

And what should be used as the "surfactant" in the solution?

Thanks very much.

OR, if I don't have Epsom salts,... I Do have some 500 mg Magnesium pills.

Can I grind up them, to then dissolve the dust in water?

And can I use a bit of dish-soap as the Surfactant?

Yes dish soap would be OK. Go to the store and purchase a small box of Epsom Salts.

First, I am not convinced that IS a magnesium deficiency. That rarely ever results in the leaves drying or the edges browning. It actually looks more like sunscald to me, which can happen very easily if previously shaded leaves are suddenly exposed to strong sunlight with pruning.

But it won't hurt to treat with Epsom salts regardless, but it will be much more efficiently used as a soil drench rather than a foliar spray. Plants absorb very few nutrients via their leaves.

No surfactant necessary with a soil drench either.

Thanks for the replies, people.

I'll apply the diluted epsom salts to the soil tomorrow.

Gal48, I sorta' doubt that it is "sunscald".

(Thanks... I learned a new word today.)

This tree has had full morning sun... forever.

AND

There are just as many damaged Interior leaves

(which never really get any direct sunlight)

as Exterior leaves.

Thanks very much for the help.

The more I look at the burnt leaves,( besides a Mg problem,) it looks like the leaf scorch from high soil salinity.

EEK !

Silica, You think there's too much soil SALINITY,

and I just added SALT to the soil... ! Well, Epsom Salt.

I just tasted a grain of the Epsom Salt... doesn't taste Very salty.

I'm concerned that the Epsom Salt increases the soil Salinity.

?

Thanks, people.

Citrus is generally classified as a salt sensitive crop because growth and yield reduction can occur at relatively low salinity.. Accumulation of ions in large amounts in leaves can cause leaf burn and inhibit metabolic processes. (Citrus Ind. Mag)

I don't understand what that means, Silica. You mentioned "accumulation of ions in large amounts in leaves"... Are you referring to large amounts of SALT ions in the leaves?

Did I just make the situation Worse, by adding the epsom salts?

Do you get the water you water the tree with, from a ground well, or from a municipality ?

Thanks very much for the continuing conversation, Silica.

The water comes from the city, and it tastes Terrible.

A look at the latest "Water Quality Test Results" report from the company measures only 19 particulates. When I lived in So Cal, there were 72 measured items on the annual report, and That water tested good. My opinion is that This company measures (or publicizes) only the items that indicate a "No Violation" reading. On that report, the only part that (I think) could be related to SALT is the measure of Sodium, with a reading of 590 ppm in an allegedly acceptable range of 230-590.

Besides the sodium you need to also ask them about bicarbonate levels.. They can also be a big problem for citrus trees.

Ah, well... Bicarbonate levels are not mentioned in this limited report.