First grow, when should I flush it?

You're going to get a lot of different answers to this question - and it's all going to depend on what YOU want to do. Some people do indeed stop nutes for about 2 weeks before they chop and this is probably the best way of ridding the plant of excess nutrients that SOME people think they can taste in their smoke if not done... but that's really only for folks who use chemical nutrients and who have HIGHLY developed taste buds... which is why some people don't think it at all necessary and don't flush at all. Folks who use organic nutrients probably don't even need to think about this as there WON'T be any nasty chemical taste. Some people do a hard flush just before they chop - but this only rids the SOIL of the nutrients, it won't rid the plant of them so THAT'S kind of useless as well. Whether or not you flush is going to depend on your preferences... and what nutes you've been using ... I personally don't bother and no one has ever complained about the taste even though I DO use chemical nutrients... So good luck on your decision... I'd say it really doesn't matter and to do what is most likely to satisfy YOU... Good luck! Nice that you're almost at harvest!