It looks like heat stress or a manganese deficiency.
adr0510 Reviewed by adr0510 on . Nutrient burn/flush Plants in 3 gallon pots. I nutrient burned them pretty bad about a 12 days ago. When I water, I make sure water comes out the bottom of the pot. Would I have by now washed out the excess nutrients or should I flush? I also plan on repotting them into 5 gallon pails also. Rating: 5