Being exposed to growing as many years as I have, flushing has only recently become a topic of investigation. Many of us have many different opinions whether or not to flush. We base our opinions on experience. That comes from time tested practices that allow / provide us with the knowledge to make an assumption based on certain criteria. If the criteria is different, than so are our opinions.
Having grown organically in the 60’s…(all we did was throw seeds into the dirt and water with a garden hose), to synthetic supplements (one of today’s methods), organics, living soils, hydro and alternate substrates to hydro (soil, coco, peat, clay, rockwool, etc). If you feed a plant in a blank substrate, you could grow them in any material (suitable please…not really anything). But when we grow, and most HOME GROWERS use some kind of soil (as the majority), the debate continued to Flush or NOT to flush. Finally, last year, a study was released…here is the link:
My opinion…I used to flush when I grew hydro as I used all synthetics and believed I could taste an aftertaste of my end product, hence, clear water flushes. Wanting to get my product to market ASAP, it also help in reducing the chlorophyll content so I got my product on the street SOONER…When you smoke a LOT, it is hard to really taste any difference in our stash. It is like being exposed to a particular odor,we become desensitized to something we are constantly exposed to. I WAS able to get my product out at least 2/3 weeks earlier as CURING time was greatly reduced. Effects…no difference, smell, strength, flavor…no difference.
Now, as a home grower and growing in soil, using organics, I find no need to flush. If anything, it robs my substrate of quality nutrients that I pain painstakingly try to add to my soil so I can compost and reuse it. After all, I do not throw away my garden soil every year…I compost (worms, leaves, roots, veg scraps), add top dressing and that is it.
Take it with a grain of salt but IMHO…no need to flush