Grotek Blossom Blaster, 2.5 kg

A Concentrated Flowering Supplement for Any Growing Medium, 2.5 kg

Flowering plants pull heavily on phosphorus for root and flower-site development and on potassium to move the sugars photosynthesis produces through the plant, and a base feed alone doesn't always carry enough of either through a full bloom cycle. Grotek Blossom Blaster supplies available phosphorus and potassium in a concentrated powder that's compatible with any base nutrient and effective in soil, soilless, or hydroponic media.

This 2.5 kg size is a bulk option for larger operations running extended flowering programs, added twice during the initial three weeks of flowering for a concentrated supplemental boost.

Key Features & Benefits

• Available phosphorus — supports root development during flowering
• Potassium for sugar movement — helps move photosynthesis sugars through the plant
• Effective in all media — works across soil, soilless, and hydroponic setups
• Compatible with all base nutrients — integrates into existing feeding programs
• 2.5 kg size — not for use as a foliar spray; always mix fresh product rather than adding to an existing solution

Who Should Use Blossom Blaster

Growers wanting a concentrated phosphorus-and-potassium boost during the early flowering window, compatible with any base nutrient program and growing medium, will find Blossom Blaster a straightforward addition.

About Grotek

Grotek is a Canadian plant-nutrient brand manufactured by Greenstar Plant Products, a Hydrofarm subsidiary that also produces the Gaia Green fertilizer line.

Frequently Asked Questions

How often should I apply Blossom Blaster?

Add it twice during the initial three weeks of flowering rather than as a continuous, every-feeding additive. That timing targets the window when flower sites are actively forming.

Can I use it as a foliar spray?

No, Blossom Blaster is formulated for root-zone application through your media or reservoir, not for use as a foliar spray. Applying it to foliage isn't part of the label directions.

Is it compatible with my existing base nutrients?

Yes, it's compatible with all base nutrients and effective in soil, soilless, and hydroponic media. You don't need to switch base nutrient lines to add it to your program.

Can I add it directly to an existing nutrient solution?

No, avoid adding it to a nutrient solution that's already mixed and sitting in your reservoir. Mix it into a fresh batch instead so the full dose reaches the plant as intended.