Sweet P

Sulfur or Phosphorous is a bit high. I'd wager S since i don't see the typical coinciding symptoms that come with high P. check your guaranteed analysis labels.. find what's adding S and make a choice of how to drop it 5 percent and see what happens -- and try to minimally impact other molecules' concentration or even compensate elsewhere to even it out again. This is one of the great benefits of soilless growing. complete control if you track it.