When to start flush?

I agree with organ.. Flushing is the final part. Putting 1/3rd the weight of the pot of water on top will stress out to bits. For the last wk. Feed as normal with tap or RO water and that'll count as a flush while ripeing continues. Lower ur lights if u haven't during ripeing

I am not a fan of the term "flushing", as most people associate it with drowning their plants with gallons and gallons of water. Rather, "flushing" should be a natual process the plant undergoes and is nothing more than stopping all fertilizers/nutrients/supplements about 2 weeks before the estimated date of harvest. If it becomes 10 days or 21 days....no biggie. All you are trying to achieve is for the plant to get rid of (flush) any nutrient salts from its system, a bit like how humans "de-tox". Someone once said this "nutrient witholding period" flushes fertilizers from the plants cellls, then someone else interpreted this to mean drowning plants wioth gallons of water. Anyway, "flush" in whatever way makes you happy about 10-14 days before you think you will be harvesting them.

You don't flush. That's bro science.

Cuando empieces a ver algunos tricomas nublados, puedes empezar a hacer el flushing Fijate también en el tiempo de floracion / cosecha que indica el banco de semillas, porque suele ser una guia aproximada, con 1 semana arriba o abajo dependiedo de las condiciones de tu cultivo, pero te sirve como info para saber cuando empiezas el flushing (aproximadamente)

You would want to have some amber and majority cloudy on there. But this is strain dependant and can differ. If all clear I would wait another couple of weeks