Most commonly known as “The Yellow Bottle,” Bloom Nutrients offer a complete line of effective nutrients and enhancers. Bloom Per Yellow Bottles are manufactured by Agricultural Organics based out of Australia and they make a super concentrated product so you get the most bang for your buck. You’re not paying for water with Bloom Pre and Bloom Yellow Bottles. Bloom Pre Yellow Bottles stimulates massive branching and triggers a stage of development called pre-flowering improving response at flower initiation. Plants grown using Bloom Pre also have much shorter internodal spacing producing much more compact plants without the use of Plant Growth Regulators (PGR’s).