Like NorCal said, and im just adding a lil something that you probably already know, but it don't hurt to repeat. 😇
Gradually decrease the veg nutes as you gradually increase the bloom nutes.
Going ⅛ ⅙ ¼ ⅓ ½ ⅔ (dose) on the bloom overtime. While doing the oposite with the veg nutes ⅔ ½ ¼ ⅙ ⅛ 0% (dose).
You could start gradually reducing the veg by now while waiting for the first big mass of pistils to pop up so you can then start introducing the bloom nutes.
Stay lit growmie and good luck.