Plants need saving!

Flush using botanicare clearex or similar product until a little runoff. Wait about an hour flush with just ph'd water until 40% or more runoff to rinse out the clearex and salt. Then water with 1/4 strength complete nutes including calmag and beneficial microbes until just a little runoff so you know the nutes spread thoroughly through the soil. Ph water after adding calmag and nutes. Then add microbes. I recommend Plant success organics soluble as it contains a variety of almost every myco and bacteria needed for plant health.

I would guess it’s Ph problem caused by salt build up on your soil . Maybe you overdid with nutrients some time ago and those salts stayed there altering the ph levels of your plants. Usually as I noticed , build up causes ph drop . U can test that checking the runoff water 💦. It should be less than 6 and plants can’t get Phosphorus, potassium, magnesium and more micro nutes . Check that will help : https://www.cannagardening.com/ph_acidity Anyways , I suppose it will be okey at the end cause your plants already middle flowering and not really much to do , maybe flush but I don’t recommend at this stage . Less nutrients with proper ph and she will make some buds ✌️👌