I bet your from America.. damn.. always overfeeding your children! JK just water flush it and let some water run all the way through the soil out the bottom to dilute out the nutes.
Thanks for the replies. I had a buddy come over and check a leaf, and he said the same thing, over fert. I have been easy on the nutes. Maybe this strain is touchy?
another thing as I take a closer look at your pics.. how many do you have in one pot? Cause if you have more than one they could be fighting each other with their roots.