I’d continue giving veg nutes at full strength this week and slowly taper them off over the next 2-3 weeks by adjusting your nutes towards the flowering/bloom nutes. I use ff but I use a mixture of the two during the stretch.
While they’re stretching they’re needing veg nutes and at the same time they’re opening up flowering sites... so they need both kinds of nutrients. As the flowering stretch begins to fade or slow down and the blooms begin to fill in, that’s when you want to push the bloom nutes harder.