Plants grown with chem nutes are likely to need flushing more than those grown with organic style nutes.

As you have seen, there are 2 distinct schools of thought on flushing. Do it, don't do it are the opinions.

We Clearex, then flush for several days before harvest. Honestly, our testers can not tell much difference from sample buds plucked while in full nute mode vs. tapered vs. flushed. We use Botanicare organic teas so the residual salts are minimal. Unflushed chem nutes do leave a metalic aftertaste in the final product.

I suppose we taper down and flush because the consumer expects it to be done, but if we didn't they could probably never tell. Saves me nutes, so there ya go we'll flush.