Just adding the microbes during transplant? Yes, I believe it would increase both total yield and flower quality versus not doing it. I don’t have a lab report done on that test yet, but microbes and beneficial bacteria are so helpful on so many other hydroponic, soil and soiless crops that I don’t grow without it.
Everything else needs to be perfectly dialed in to really get the best benefit, but they also help keep the plants ready for stress and infection and can help to minimize losses too.
Any kind of microbe you choose to run, run it! Try URB, try mammoth P, check out tribus or any of the dry products.
Find an enzyme, some aminos, fulvic and kelp or seaweed while you’re at it. They all serve a real purpose throughout all stages of growth. I like the RAW stuff because I’m doing everything with my feedings bas percentages and I like dry weight rather than mL.