When to change nutes for flowering

Im using flora Nova grow for veg and flora nova bloom for flowering. I started flowering two days ago and was wondering if i change the nutes right away for flowering or not?

I have heard people do it various ways, but if you are using a three part nute, the label usually has a transitional guideline for the first two weeks of flower - a certain amount of base, some of veg, and some of flower. If using a two part you could do half and half.

Some stay with veg, some go right to flower. Personal preference I guess. I do half/half/transitional myself.