It is a tireless debate..to flush or not to flush.
Organically speaking, it really doesn't matter. The way I grow, they get straight water from seed to bud. This is, what I consider, the way nature intended for plants to grow...gaining nutrients from the soil food web.
This, I have found, produces the tastiest, most aromatic buds I have ever come across.
edit: By "straight" water, I don't add any nutrients in. Howeevr, I do use bacterial/fungal innoculations, as well as molasses as an additive. My intention was to say there are no added nutrients such as bottled nutrient lines.