Is 1 week flowering too late to get dutch masters reverse ?

How late is too late for this stuff im basically in preflower just a bunch of pistills and tiny nanners starting here and there ?

no its not too late.

i just used it at day12 and it works saved the whole crop.No side effects so far jus nice normal flowering.

awesome grabbin it tomorrow sounds sick !!

Make sure you use a penatrator with it. Not too late should still help. I will say though that if you are already getting nanners at 1 week of bloom you have some issues this might not totally resolve.