Zkittles round two

End of week 8, per flora trio refining I am using no more floragro moving forward. Buds have increased in size this week, BUT, I am seeing the serrations along leaf margin curling upward, could this be heat stress? I see no other “major” characteristic signs of nutrient deficiency...unless a more trained eye in the community can identify one? Only other thing I can note, perhaps I’m reading into it, but the lower leaf structure seems to point downward, not laterally like usual. They are not curling, chlorotic, necrotic, or otherwise, but certainly seem to be orienting differently.