I use B vitamins when cloning and germinating. It works extremely well for this purpose. I have also found plants respond well to a few odd mL of B vitamin during veg and flowering as opposed to plants that don't get it. B Vitamins benefit your plant, and algae, and fungus. Soil microbes from your store of choice help prevent this in an organic garden. Hydrogen Peroxide will help in a chemical garden. This is why there was fungus and algae on the samples with the B Vitamin. To me, all that study shows is that daffodils don't respond well to B Vitamins. Find a study done with herb and you'll have more accuracy. Oh wait! Nutrient companies already have! There's plenty of usefull things to market to growers, so most established nutrient companies don't stoop to selling "snake oil". Find the ones that work best for you! The only good nutrients are the ones that work well for YOU.