How Long Until Harvest?

About another 3-4 weeks, perhaps 5, depending on the strain and your preferred effect from the flowers. Harvest when 95% of the pistils are brown for a THC induced mind bending head high and start plain water once the plant gets to about 90% brown pistils. Harvest when there are 100% brown pistils for a CBD induced sedating body stone and start with the plain water at around the 95% brown pistil stage. Let your preferred type of effect guide your harvest timing, - with the guides I have given you, "flushing" usually lasts about two weeks before harvest. Personally, I don't see a need to pH the flush water, I don't want ANY chemicals to afffect my buds right before harvest! Plain tap water is fine and pH will not affect your plant that close to harvest as all growing has stopped and it is only a matter of ripening, which pH does not act upon. I have been using the "pistil colour method" for 25+ years and am sure of its accuracy, unlike judging harvest timing based only on trichome colour, as some plants will never develop amber trichomes and others can have 75%+ amber trichomes after only 4 weeks of flowering. Besides, pistil colour is a direct reflection of plant health, where as trichome colour on its own is not, and it is plant health that determines trichome chemical composition, where as trichome colour does not effect trichome chemical composition. There are too many variables in plant genetics to say "harvest when there are 30% amber trichomes", as this broad statement can not hold true for every cannabis strain and every growing situation to make it a 100% reliable "rule". Pistil colour on the other hand is 100% observable and 100% identifiable, making it 100% quantifiable and for 100% of cannabis plants and is completely independant of genetics, growing conditions and calendars. The amount of people who I have seen in this forum, desperate to harvest near dead and grossly over mature plants while waiting for the magical "30% amber" to appear, as if it were the gospel truth, is staggering, and makes my heart ache to think they have spent all that time and effort and sadly ended up harvesting flowers that makes you fall asleep and do not get you high, due to greatly degraded cannabinoids as a result of being so over ripe and a plant that is so close to death that there is no active metabolism any more, which is what causes the cannabinoids to break down. Enough preaching! (but I do feel better now having got that off my chest!) Hope this helps, Organoman.