Day 26 bloom or grow nutes

Never grew autos before. These white widow’s are on day 26, and are obviously starting to flower. How long do you pros continue to feed grow nutes before switching to bloom? These grew over 2” in less than 24 hours.

Flower stretching happens first 4 weeks of flower, that's when it uses most nitrogen in flower.
After the fourth week I cut back on nitrogen and go heavier on phosphorus and potassium
I start my bloom nutes a week before the switch so it has readily available blooming nutes to feed on when it makes its transition.