wondering if they are almost finished...

Hey guys! Was wondering if I could get your input on when you think this plant might be done. Its in about its 5th week of flowering, but has only recently started to look frosty. This picture was taken 3 days ago so it looks a bit more frosty now as well. Any ideas?

http://img707.imageshack.us/f/finished001.jpg/

more time needed!

how long do you think? I figured they were getting close to finishing so I have them in pure water rather than a nute mix. Think I should put nutes back in?

Well most plants need at least 8 weeks flower time... so 3?