When Size Matters, Use Flower Bomb Maximiser Additive to Trigger Explosive Flower Formation Flower Bomb Maximiser Additive promotes extraordinary flower formation in the latter stages of the bloom period. It increases the density of the finished product and can be used in conjunction with PK boosters to boost final weight by up to 70%! Flower Bomb is regarded as one of the most potent PGR based flower enhancers on the market. It’s effective in all types of growing system and with all types of growing media, and it can even be used to control height in taller or longer flowering varieties. How Flower Bomb Works Flower Bomb Maximiser Additive works by triggering explosive flower formation using plant growth regulators (or PGRs). These PGRs have been certified as safe for use on crops, and have been used for some time in professional horticulture and agriculture. PGRs increase yields by promoting cellular expansion through signal transduction pathways, stimulating plants to grow dramatically in size. Flower Bomb can also be used to control height levels and stretching by adding it to your routine during the third week of the bloom phase.