Hello, im in day 1 week 8 of flower with a 65 day ...

Okay. A 65 day strain. These are numbers mate that are a gauge for harvest window So, generally you need a loop. Checking trichomes is 1 of the most important part of your grow. As you do more, yes, you can judge by eye. But I've yet to meet a growers that doesn't check. As the longer you leave, more Ambers, dictates the smoke of your weed + if you've lots of clears. As once buds have finished fattening. Its hard to judge from when they finished that to 2 weeks, usually id like to see some fade in the fans, as most plants in their peak ripening window throws fade into the leaves. This is not always de case. But with barneys strains. 90% of ripened plants throw out some fade. So its 9-10weeks for flowering. That can be 9 or in some cases flowering cam be as long as 13weeks. Loops are essential 90-95% cloudy harvest window. You should see some ambers. The more amber the more degrade of thc but more CBD. Anyways thats how you'll know.

Flush is for hydro or coco. In soil some growers stop using nutes, to save some money and let plant consume whats inside of pot. Its very controversial, there is no studies on it, all just bro science.