Field Marshal Flower Bomb | Concentrated Flowering Additive

Flower Bomb (Weight Gainer) – Field Marshal - image 3

£12.49

Size 30ml 250ml 1 Litre Syringe Only 5 Litre

Flower Bomb – Field Marshal Power Additive

Field Marshal Flower Bomb is the most concentrated additive in Field Marshal's Power Additives range. It is designed for a short, precise window during the flowering period, used alongside a nutrient solution high in phosphorus and potassium. Because it is so concentrated, it's used at just 1ml per litre and for no more than two weeks in total.

This is a product that rewards a disciplined hand. Please read the directions and safety information below in full before use, and never exceed the stated dose.

Is Flower Bomb a PGR?

Flower Bomb is widely sold and talked about as a PGR (plant growth regulator), and the name has become almost a byword for one. Field Marshal's own UK safety data sheet (revised August 2024) tells a different story. It lists the declared ingredients as potassium dihydrogen phosphate (5–10%) and potassium sulfate (1–3%), declares no plant growth regulators, and does not classify the product as hazardous. In other words, on the manufacturer's official paperwork, Flower Bomb is a concentrated phosphorus and potassium flowering additive.

How to Use

These directions are taken from the Flower Bomb label:

Shake well before use.
Add to your nutrient solution at 1ml per litre.
Do not exceed 3ml per litre.
Use for 2 weeks only during the flowering period (for example weeks 4 and 5, or weeks 3 and 7).
Use alongside a nutrient solution with a high phosphorus and potassium content.
For best results, use a fresh growing medium.
Do not combine with other products that contain plant growth regulators.

Safety Information

From the Flower Bomb label. WARNING.

Harmful if swallowed or if inhaled.
Can cause serious eye irritation.
Toxic to aquatic life with long-lasting effects.

Handling and storage: wear protective gloves, clothing and eye protection. Use in ventilated areas. Keep out of reach of children. Store in the dark at 5–30°C.

First aid: if in eyes, rinse cautiously with water for several minutes; remove contact lenses if present and easy to do, and continue rinsing. If eye irritation persists, seek medical attention. If swallowed or inhaled, call a poison centre or doctor if you feel unwell.

Disposal: avoid release to the environment. Do not release undiluted solution into drains. Dispose of contents and container in accordance with local and national regulations.

🌿 Rose's Pro-Tip: 1ml is about a fifth of a teaspoon, far too little to judge by eye. Measure every dose with a syringe, which is available as an option on this listing.