Alright... They look PH stressed. Have you given them nutes?

For soil you should aim for 6.5-6.8 PH.

Also the nutes... You said full str? Try going half str for a week and see how they react.

Always start at about 1/4 str nute solution and see how they react. If good you can increase the nutes over time. By doing that you will find the right amount of nutes that the plant can handle at any given time. If they react bad then back down a little bit.

ALWAYS PH your nute/water solution after it is mixed. PH adjustment should be the last thing done to the mix/water before it goes to the plant.

Did you get a ph pen or drops?