tricombs and nute burn

I am growing Albert walker my plant has white tricombs witch im told r good however it also has auburn ones witch im told means its ready for harvest but I still have a month and half to go and also how do I get rid of nute burn

The amber ones you see if they are on edge of leaf are not amber but dried/old leaf...
What part of plant is nute burned ? You have 6 weeks + to go, if you have a problem, you will need to show pictures for the experts to help you fix......