Brown marijuana buds

A question from a fellow grower:

Help me. Don’t know what is going on with my plants. I have this one that is really bad and another one that is starting to show the same signs. I’m flushing right now and getting ready to harvest. Can you help me? What do I need to do and are they going to be okay.

It looks like nute burn. What were your PPMs right before flush?

Years ago before i got a EC meter I actually had all the Colas on my plant (don’t know the strain) looked very similar then I bought a EC meter and even thoughi mixed the nutes according to the lable it was it was 2·9 instead of 2·2 EC 1100 ppm

I would ask if you foliar feed your plants?