Feed or not to feed, that is my question

Well I had thought it was maybe 2 weeks off from finishing but I'm not sure anymore. I don't have a ppm meter and I normally try and judge things by eye. I had some nute burn early on so i cut back but my plant is multi colored so it is confusing me. I have dark green, yellow, purple, yellow with spots of death and stems are turning purple. I understand that late flowering the fan leaves should die. It looks like it is about to start bulking up so should I keep feeding or flush and only ph water?

Strain is blue mystic.

I would either go with ph'ed water or really light on the nutes. But I would love to see what others have to say!

Looks a bit def in P & K. Did you add these in small amounts in the last few weeks when the buds started forming?

What water are you using? Any idea on PH level - perhaps you have a lock out due to this.

I use tap water that I leave out for a day, I check ph every day and adjust for 5.8-6 also been feeding 1/4 strength after I notice nute burn.