Newmarket, Ontario (Head Office)
1175 Stellar Drive, Unit #5
Newmarket, ON L3Y 7B8
- Mon10:00am–6:00pm
- Tue10:00am–6:00pm
- Wed10:00am–6:00pm
- Thu10:00am–6:00pm
- Fri10:00am–6:00pm
- Sat10:00am–4:00pm
- SunClosed
$0.00 CAD
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Grotek Blossom Blaster™ is a concentrated bloom additive and flowering nutrient supplement designed to support rapidly developing flowering sites and bud filling. Built for the flowering stage, it focuses on delivering abundant nutrients when plants are shifting into bloom and setting the foundation for strong flower development.
This highly concentrated formula is made with high-grade ingredients to support flowering plants through key moments of floral development. Blossom Blaster™ supports prolific flowering and helps drive rapid development in active bloom sites, making it a strong option when you want a focused bloom additive that targets flower growth momentum instead of general-purpose nutrition.
Blossom Blaster™ contains high levels of phosphorus and potassium, two essential macronutrients required by plants. Potassium supports the movement of water, nutrients, and carbohydrates throughout the plant, which matters most when demand is high during bloom. Phosphorus supports overall plant structure and vigour across growth stages, helping plants maintain strength while they develop flowers. The formula is derived from monopotassium phosphate, keeping the ingredient profile focused on the core inputs behind its flowering-stage role.
For system flexibility, Blossom Blaster™ is suited to soil, soilless, and water culture setups, including hydroponics. It’s positioned for use from early plant development through flowering and up to bud break, with added value prior to bud break when flower set is a priority. If you want a bloom nutrient supplement that supports abundant blooms with a clean, targeted approach, this product keeps the emphasis on bloom formation, bud filling, and plant performance through the flowering stage.
This is a good fit for growers running hydroponics, water culture, or soil and soilless media who want a concentrated bloom additive that supports prolific flowering, aids in rapid development, and promotes strong flower set without overcomplicating the nutrient program.
Step-by-step mixing and feeding instructions for Grotek Blossom Blaster - 130 Gram.
Fill your reservoir or watering container with clean, room-temperature water first. Shake the bottle of Grotek Blossom Blaster - 130 Gram well before every use. Using the feeding schedule below, measure the recommended dose and add it directly to the water while stirring. Allow the solution to mix fully before adding any other fertilizers, additives, or supplements.
Always add nutrients to water — not the other way around. Mix thoroughly between products to ensure an even, stable nutrient solution.
Vegetative stage — Blossom Blaster
Flowering stage — Blossom Blaster
Warning – Important Safety Information
This product may cause mild skin irritation and eye irritation. Avoid unnecessary contact with skin, eyes, and clothing. Use only as directed.
General safety precautions
Read and follow all instructions on the product label and any accompanying documentation before use. Keep out of reach of children and pets. Do not ingest. Avoid breathing vapours, mist, or dust that may be generated during handling or use.
Wear appropriate personal protective equipment (PPE), such as protective gloves, long sleeves, long pants and closed-toe footwear. When there is a risk of splashing or airborne particles, use safety glasses or other suitable eye and face protection.
First aid – skin contact
IF ON SKIN OR HAIR: Remove contaminated clothing immediately. Rinse skin with clean water for several minutes, then wash with mild soap and water. If irritation or redness develops and persists, seek medical attention. Wash contaminated clothing before reuse.
First aid – eye contact
IF IN EYES: Rinse cautiously with clean water for several minutes, keeping eyelids open. Remove contact lenses if present and easy to do. Continue rinsing. If irritation persists, obtain medical advice.
First aid – ingestion and inhalation
IF SWALLOWED: Rinse mouth thoroughly with water. Do not induce vomiting unless instructed by a medical professional. Seek medical attention if you feel unwell.
IF INHALED: Move the person to fresh air and keep them comfortable for breathing. If coughing, breathing difficulty, dizziness or other symptoms occur, seek medical assistance.
Storage and handling
Store this product in its original closed container, in a cool, dry and well-ventilated area. Protect from extreme temperatures and direct sunlight. Keep container tightly sealed when not in use.
Avoid release to drains, natural waterways or outdoor soil. Dispose of unused product and empty containers in accordance with local regulations and the directions on the label.
Important: If medical advice is needed, keep the product label or container available. Always follow the specific instructions and safety recommendations provided by the manufacturer. This safety notice is intended as general guidance and does not replace official label directions or documentation.
| Available Phosphoric Acid (P2O5) | 48.0% |
|---|---|
| Soluble Potash (K2O) | 31.0% |
Available phosphoric acid provides a fast-absorbing form of phosphorus that fuels root growth, energy transfer, and strong flowering. It becomes part of the plant’s total available phosphate supply, but the two terms are not the same—available phosphoric acid is one source of phosphorus, while available phosphate refers to the entire pool of plant-available phosphorus overall.
Soluble potash (K2O) is important because it helps plants control water use, move sugars to new growth and fruit, and build stronger, higher-quality structure under stress. It’s unique from many other nutrients because it acts more like a regulator and transport helper than a direct “building material,” so the biggest benefits show up as steadier growth, stronger stems, and better finishing instead of just bigger leaves.
Monopotassium phosphate provides fast phosphorus and potassium that support energy use, nutrient flow, and bloom development without adding nitrogen, so it helps flowering progress cleanly without pushing extra leafy growth. It’s unique because it delivers a focused PK boost in a highly soluble form, which can correct stage-related demand quickly, but it must be used carefully to avoid potassium-heavy imbalances that can block calcium and magnesium uptake.

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