I wanted to add my last post to this, after doing more research I stumbled upon a method of curing that I did not know of. With this method, you can feed up all the way until harvest, since the reverse osmosis removes any foul entities.
Water Curing is done by cutting down your buds and removing the fan leaves. It's optional to do further trimming, but note that cured trimmings always make better hash. Place them in a bin of Reverse Osmosis water and keep below above 65F and below 75F. Use something to gently weigh them down. Once a day for 3-7 days (depending on personal preference) change out the water with clean fresh RO water. Because there is a high concentration of chlorophyll and salts in the buds and none in the water, Osmosis will naturally occur, drawing it out of the plant until the levels are equal. The water is changed out to keep the osmotic pressure at its highest: day old water will not have the same osmotic force to suck out everything. After the 3-7 days, hang and dry the buds like you normally would. Done!
Results:
-Less bag appeal
-The smoothest bud you'll ever smoke
-Bud is more potent, but only because the total weight is reduced. IE- where you may get 1.5g air curing, you'll only get 1g with water cure: a much purer product
-Using them method allows you to pump in nutrients all the way to the end, with NO 1-2 weeks of flushing. That could increase yields significantly.
Remember that nothing we want to smoke is water soluble. That means it will not leach out into the water. The only thing that can happen is trichomes can break off if you treat the buds roughly: be gentle.
So, I stand firm with flushing during pre harvest if you use jar curing, but if you want more potent buds, you should feed all the way up until harvest and use the water curing method. Just my 4 cents ;