8 weeks is a good number, could be 8 1/2, 9, 10, etc. it all depends... Why are you so set on flushing? Do you have nute lock out/ salt build up? If not feed your plants the nutrients it needs until harvest...Thanks guys. Would you assume an 8 week harvest? I'm just trying to get my flushing schedule right.
Same to make sure u have no chem tasteI've always heard/read to flush 10-14 days before harvest.