How to tell when ready

[Oilcan]

My first grow Candy Kush auto 90 days in. Just wondering how to tell when to harvest. I haven’t noticed any amber trichomes. I started to feed just water. By looking at pics is this the right move or should I provide nutes until I notice amber?

 

[mysticepipedon]

When all the white stigmas turn red, start looking at trichomes. It's usually about a week or so after that point.