The Flower phase has different stages and if you want huge cola's you need to feed it the right nutes at the right stages or you can do what most people do and that is to feed it the same base nutes and the same additives throughout the hole cycle.
Keep in mind, with the Og strain it can take in more ppm then most plants.
I ran bud ignitor many time and I would use 1 to 3 weeks during the flowering stretch phase. Use Bud ignitor, A+B and big bud with bud candy and half strength on bud factor X(bud factor X starts tricking the plant of heat stress). Bud factor X allows your plant to get ready to produce insane amount of terpenes for the 2nd flowering stage, which is the budding phase.You'll know it is working when the buds look like it has been forming for 6 weeks but we're still in week 3.
Next is the bud forming phase, in weeks 4 to 6 I would use Bud candy, Big Bud, budfactor x, resinator and for base nutrient I would be careful. If your leaf is really dark green at this point there is too much nitrogen and you may get leafy buds or fluffy buds( assuming your temperature is okay). If you have really dark green leaf, I'd skip the base nutrients for 2 weeks and this forces the plant to use the nitrogen in the leaf. If the color of the leaf is normal green then add the base nutrients. Keep this in mind, during weeks 5 and 6 your bud calyx will start to swell rapidly and if you have bud hardener( like the rock) or overdrive you would add this to your nutrient solution. And also, for soil medium that is 5 gallon, I wouldn't suggest going over 700 ppm. If you want to use all those nutes you may have to max out at 1000pm, then use plain water in between the feeding schedule.
Last 2 weeks, You can continue to add more bud candy but don't forget to do at least 1 week of flush or do straight 2 week flush its up to you.
Sadly, from my experience it is not wise to mix organic soil with synthetic nutrients. You may create cannabis problems that is hard to fix, such as, insane random stretches or the flowers will reveg itself in a 12/12 cycle. The reason for this is synthetic nutrients will kill beneficial bacteria in the soil and that dead bacteria will create toxic problems in the root zone. If you experience this problem, I would recommend using some sort of enzyme that can break down dead matter and convert it to food source for the roots.
Also, I would recommend using snow storm ultra instead of bud factor X. Because bud factor X is too pricey, and snow storm ultra does the same thing as bud factor X. However, I personally think bud factor X creates more terpenes then snow storm ultra but you won't know the difference unless you are a biology freak like me with an expensive microscopic system.