Need to start flowerin, need a hand.

Using GH nutes in 2.5 gal. waterfarms with 12.5 ml grow, 6.25 ml micro and 6.25 ml bloom. Problem is that I'm only using the week 2 nutes from the GH schedule and the plants are 20+ inches and thick, like 1/4 inch bases. I need to flower, but don't want to burn. What would be a good nutrient mix to start flowerin? Any help would be awesome.

To make it easier for everyone to understand what you're feeding, here is the ml / gallon amount that you are using, for GrowMicroBloom, or 5-2.5-2.5, and that is a low-concentration of GH Flora series nutes.

For the first week of 12/12 give them the same, and then change to 2.5-4-7 until the 5th week of flowering. Then use 0-4-7 and add KoolBloom.

HTH

I use 7.5, 5, 7.5 (ml/gal) (micro, grow, bloom) for my early stages of flowering. I also use GH.

Here is pretty much what I follow: (not including other suppliments)
VEGETATIVE GROWTH (Day 15 - 45)
Early - 1 tsp (5ml) each - micro , grow & bloom. Adjust PH to 6.2
Middle - 1 1/4 tsp (6.25 ml) micro, 1 1/4 tsp grow, 1 tsp bloom. Adjust PH to 6.2
Late - 1 1/2 tsp (7.5 ml) micro, 1 1/2 tsp grow, 1 tsp bloom. Adjust PH to 6.2

FLOWERING (Day 46 – 106, more or less depending on strain)
Early - 1 1/2 tsp micro, 1 tsp grow, 1 1/2 tsp bloom. Adjust PH to 6.2
Middle - 1 3/4 tsp (8.75 ml) micro, 3/4 tsp (3.75 ml) grow, 1 3/4 tsp bloom. Adjust PH to 6.3
Late - 2 tsp (10ml) micro, 1/2 tsp (2.5 ml) grow, 2 tsp bloom. Adjust PH to 6.3
Later - 2 1/2 tsp (12.5 ml) micro, 1/2 tsp grow, 3 tsp (15 ml) bloom. Adjust PH to 6.4