Let Me help you guys out.... On Soil My "flush" is aprox 1/2gallon per pot size, with plain water, 3 days before chop..., I have found this to be be the best time to clear excess waste from the system... on a hydro system I lower PPM to around 400-500 5 days before chop a full 4x4 or 8x8 table will eat most of that in about 3-5 days depending on resivoir size...
now let me explain the theory..., Picture a Shrimp... now picture eating a shrimp that has a full waste tract (poop)... bitter and nasty... yuck... unlike shrimp, on a plant you can't "de-vain it"... stop the suckers for eating for a day or two... then the garbage is excreeted from the shrimp and it tastes good... This is the same with the plant... flush most of the chemicals out of the plant and it will taste "fresh and natrual"... but if you insist on flushing multiple times, then you will be underfeeding the plant, creating deficiencies and Ruin some of your work... and possibly ruin the yield of your crop because of starvation...
also... for those of you that use molasses/honey/budcandy/etc... cut it out at least 1 week before chop... I can smell that crap in the plant after harvest... you don't need to be feeding "benificial bacteria" on the last week... and it will NOT add any weight to the plants... it also does not improve the "smell", nor the "taste" or the "resin count"... your best bet instead is to add some MPK... (mono-potassium-phosphate 0-52-34)... (big bud/ Mother of all bloom/liquid cool bloom/etc...) the last two weeks... don't go over 2.8 EC (1400ppm on Ec x 500) and use a base of 700ppm..., last week cut base down to 600ppm and stay at 1400ppm (2.8 Ec) untill flush with tap water... you should bairly get leaf yellowing on the last week... clearing Nitrogen out of the system... and YES... I sugest forceing some yellowing on the last week... as it clears more Nitrogen out and smells better...
Hang drying with leaves on, fan blowing air around to prevent mold, dehumidifier at 50%, and it should take about 1 week to finish drying... if you Trim before it's totally dry... you'll loose smell, and if you trim and bag it before it fully dries... it may smell musky/damp... and get moldy on the inside... and if you don't add the fan circulating air around, you're also more likely to get mold...
hope this info helps...