it depends on what your feeding the plants, and on what schedule, and what strain it is, and whether or not he uses molasses, if so how much, and what his harvest method. In general though, it is better off for taste, health, and quality of high, if you flush for at least 5 days before harvest. It all comes down to the chemical processes involved in energy production and storage in the plant. If you start the flush, it will encourage the plant to use the energies in reserve to produce more resin etc. this is actually fairly advanced and technical (as most growing really truly is anyways), and is extremely circumstantial.
Text book....But who's?
Al, using molasses.....LOL, now that is funny
I am sorry Dragon, but your post offered no solid info for Dewey, just jibber jaber. Next time you offer advice, you should realy consider what you are saying. I hope I don't offend you to much, but please keep your opinions as opinions, not as a fact.