That's a general statement. Plants will translocate nutrients in veg as well if it doesn't have it at the roots, it makes no difference whether it's in flower or veg. If he has a deficiency, which i mentioned to him a number of times but he ignores it, so i watch him struggle, then how is that a 'never-ending' losing battle? The plant is programmed to eat its leaves all the time..if it does not have the food available. It only takes 10% of an element to be missing for leaves to start showing signs. He has a clear deficiency that has been building for weeks, he keeps flushing for some reason and doesn't understand why his problem is getting worse.