Where are you located, when were the arbs planted and how have you been watering them (frequency and duration)? While the stuff wont hurt them, it should not be necessary and I doubt it will be of much benefit after the fact.

These supplements and tonics tend to be more snake oil than a measurable benefit.

How are you checking the depth of your watering/ penetration??

With Thuja that crap out during establishment it's usually due to a lack of DEEP watering.

any chance at a pic???

it sounds like your plants are too far gone to save.. and you will being throwing good money after lost money ...

and shame on the dude willing to take it.. with no guarantee his alleged remedy will work ..

your trees are severely stressed.. probably due to improper watering during planting and afterwards.. NO AMOUNT OF FERTILIZER IS GOING TO CHANGE THAT ...

fert is never a response to stress ...

snake oil ...

ken

ps: yellow branches on an otherwise deep green tree... is not an indication that they will recover.. it is more an indication that they are fast going to be brown ...

They were emerald green end of June. we were watering with a hose daily till the water created puddles. when they turned brown we tried to save the rest and did sprinkler. then the rest just followed. the soil is more of clay nature.

Those are dead.

tj