Definitely do a flush. Then what exactly is your nute mix, and how often?

All I see is you are using FF nutes I think. Right now your mix should be 1 tsp. Grow Big, 1 Tbls. Big Bloom nothing else, except ph down if needed. And you must alternate between nuted water and plain water. I highly recommend getting the entire group of FF nutes. It is well worth the cost, and follow the feeding chart that comes with the granular package.

Best of luck and nice plants by the way. I have smoked ICE and is a very nice Buzz. Only seen it dry so it is going to be nice to see it grow.