Organic GH in Veg, then GH Flora for flowering

I switched from GH Flora to GH Organic. The veg stage loves it, the flower side gave wimpy, loose buds on 3 consecutive grows. Yield was about half of normal GH Flora. Started adding GH suplements (GH Floralicious bloom, Liquid cool bloom) and it seemed to help. I now veg in all organic, then flower in all Flora. Are there any tips on minimizing the shock during the transition from Org to Flora? Flush first?

My current harvest is looking good, just wondering if anyone else has any experience with doing it this way.