@LT Mont Your troubles probably started well before the Tiger Bloom application. It looks to me like you ran out of P-K. That is mostly irrelevant now.

OF is Soil and you cannot successfully flush soil it often makes matters worse. Soil has elements like Dolomite lime and other rock hard sources of nutrients that the soil microbes break down into the ionic forms the plant can uptake. Flushing washes away all of the available soluable nutrients along will most of the living microbes but leaves behind the solid forms of nutrients totally out of balance. You have no way of knowing what is in the pot and no way of determining what to add back in to try to get the balance back. You simply do not have enough time to get the soil healthy again before the plants are done.
The first thing you should do is an application of Recharge with a complete balanced fertilizer at 400 PPM. Do not add Cal-mag. You can use some Epsom Salt at 1g per gallon of fertilizer mix.
The proper use of “salt” based fertilizer to grow Auto Flowering Cannabis. Salts: Natural and man made any chemical compound formed from the reaction of an acid with a base, with all or part of the hydrogen of the acid replaced by a metal or other cation. Learning how to use salt based...
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Get some Earth Juice Microblast and do a foliar application ASAP.
They are not dead yet and I have seen worse make it to harvest. They just will not be all they genetically could have been.