Looks like a couple of weeks to me, I would give a mild dose of nutrients and let em' go for a few more weeks.
Bullshit, why are you guys answering questions that you clearly dont know the answers to????
Dont listen to these guys,man! 2-3 weeks??????? Bad,bad guess!
If you dont know the answer then dont potentially fuck up someones grow with a really bad guess!!
Im growing kushberry myself at the moment and I am now in the 4th day of my 7th week of flowering and consequently in my 4th day of flush. The suggested flowering time for Kushberry is 60 days or 8-9 weeks.
Now everyone goes on about needing to see the amber trichomes and Im down with that but if you havent got a microscope n ur a ghetto grower like me then I would just go by the hairs. The hairs on mine are a little more than 50% orangey and I intend to wait until at least 85-90% of them have turned. Plus, as Kushberry is an indica hybrid it will have that hard-hitting, stoney, relaxed buzz anyway so the way I look at it you dont really need to wait for amber trichomes neccesarily. An indica with amber trichomes is gonna be pure, retarded, couchlock! Especially an indica of this strength. A good rule of thumb is that indicas are better pulled slightly early and sativas should be allowed to mature for a while longer than expected. Hell, Northern Lights has a suggested flowering time of 8 weeks but Ive heard of people cutting it down after 6.5 weeks!!
My advice is this.....DO NOT let it go for longer than 9 weeks!