It's been a week since you typed this post, so you're probably seeing those changes you're asking about. White hairs develop and buds form, and that's about it. The plant should become very smelly so I hope you're in a place where you can have that kind of stink around. I had one in a shed and some neighborhood girls came over. They were about ten feet outside the shed and they were asking what stunk so bad. Pretty funny. As weeks go by, the plant will die naturally by turning yellow. As you get into harvest time don't give any more fert for the last couple of weeks. Just let it die. You do this when the plant is big enough but it's not something you can control. The plant will die with or without fert. Don't give fert in the last two weeks because you'll end up consuming it along with the plant. The plant will continue to grow in flower too. You might consider translanting to a bigger container. 5 gallon buckets (20 liters) usually are enough space for an indoor growth life span.
As for colorless world's reddish stems - don't worry about those.