I suggest go get a nutrient specifically for flowering,lots of nitrogen I think you have there.Im thinking maybe slow down a little with your watering. No heat problems there . Good luck with a good result there...
Something missing bro.Those flowers are so slow if your pics are on time.I hope they fill out nice for you.I know some strains are slow to begin then fill rapidly but I've never seen this before.:amen::phew:
I just had another look at ya pics,almost looks like sunburn.Sometimes I've moved a pot from the shade into the sun and that can burn the leaves.What was the nutrients you used?