"Might"... Exactly.
I meant that the deficiency being harmful is backed by good science and common sense (not the opposite). Your claim in supported by theory only, not by demonstration. Still, the best we can demonstrate in practice is "no difference".
I am suggesting that all mights, maybes, could be's and feelings be rejected universally... not just on the pro-flushing side of things. Let's stick with what we can demonstrate in reality, not just on paper.
If you agree that deficiency is harmful to plants (and that this is backed by good science and common sense) then why do you find the need to reject the theory I stipulated, about nutrient storage in cannabis and how that relates to pre-harvest flushing?
It is after all only a theory and I make sure to make it clear it's a theory, I have never claimed it to be scientific fact.
One day I hope to do so though, but the scientific research is lacking at the moment.
Even if we do reject all theories and focus solely on scientific fact, we're still left with:
Why go through the hassle of pre-harvest flushing, getting new water, replacing water (getting rid of the old solution), running it through the system, re-pH'ing etc (which can be a genuine hassle if you have a medium sized grow or larger) if it doesn't improve your grow in any way?
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you should never flush to the point of deficiency, u add plain water cause theres enough to do the plant in there already. that is starving your plants
However, most people who pre-harvest flush, flush with pure tap water, RO water and cause deficiency within days.
It lies in the definition of pre-harvest flushing that you cause a deficiency, since most people who do it, simply remove their nutrient solution completely.
The general advice on pre-harvest flushing from "pre-harvest flushing experts" is: "flush with pure water".
A little less nutes, NOWHERE NEAR NUTELESS BUD, but because you did not feed the plant for the last 2 weeks, the most vital 2 weeks in the plants entire life, you just lost about 10-15% of bud growth.
That is basically the same as my theory of nutrient storage, usage and productivity loss by deficiency.
And I agree with you, people pre-harvest flushing are starving their plants in the most critical phase of growing, where most growth is achieved by the plants and thus, a loss of yield should be noticeable due to the deficiency.
However, we don't have scientific studies showing this, it's still a viable theory in my opinion.