Nut Burn Or Deficiency Or Toxicity ?

[shades]

It's getting towards the end of the harvest:

She is being fed Jacks 321. Part A 12g, Part B 8g, Mg Salts 4g. Between a litre and litre and half of water every day. Peat/Vermeculite 50/50 substrait mix. No macro shots here but about 5% amber looking trichromes. Waiting to about 10% before I harvest, still a lot of clear trichromes on the macro.

 

[BoostNBuds]

Looks normal to me.The plant uses up the nitrogen etc in its fan leaves towards the end of flower, it's a final "push" by the plant to get fertilized before it's too late. When they look to shabby I trim them off. Depending on how far along in flower you are, I'd consider beginning a flush.(My opinion anyway)
-Ben