the reason is. first of all, if you flushed your plants properly, you wont have to worry about the starch and salt uptake by the roots, because there is no starch and salts to uptake by then. second yuo will be harvesting your plants when the medium is dry, when the plant senses there is no more water, they crank out the resin production in the glands as a coolant to help cool the plant off. so after a full day of this cranking of the resin production, cut the plants to achieve full potential. hope this is understanding, i'm pretty high right now.