Hello Smoth313,
Because you still only feed grow nutrients and nog blooming nutrients. You also do not feed enough Nitrogen (grow nutrients). You want to add blooming nutrients to your nutrient solution and also up the amount for the grow nutrient.
You can look at the website from Biobizz what the recommendations are for the nutrients and their amounts. When you follow this schedule it will solve all your problems.
Happy Growing Buddy! 💚