Supposedly (controversial), its to purge the plant of nutes, making for a healthier, better tasting product. Nothing to do with speeding up finish as far as I know.
I THINK flushing has more to do when someone uses high PK boosters, which are pretty toxic, an unnecessary expense when the grower uses high quality nutes in the first place
I stop running nutes last week or two of flower because I think its a waste of money and not needed and also I think it helps start the curing process.
Supposedly (controversial), its to purge the plant of nutes, making for a healthier, better tasting product. Nothing to do with speeding up finish as far as I know.