Explode Flower Density, Increase Yield & Finish Like a Pro

Grotek Monster Bloom™ 0-50-30

A legendary high-PK bloom booster trusted by growers worldwide, Monster Bloom delivers a powerful, concentrated surge of Phosphorus and Potassium at exactly the moment your plants need it most — transforming light, airy flowers into dense, rock-hard, commercial-grade flowers that actually reflect the effort you put in.

If you're chasing maximum density, heavier harvests, and a finish that does your genetics justice, this is the formula that delivers.

Why Monster Bloom Dominates the PK Booster Category

Massive 0-50-30 PK Ratio
Delivers a high-intensity bloom signal that triggers explosive flower development and rapid bud bulking.
Rock-Hard Bud Density
Transforms soft, airy flowers into tight, heavy, commercial-grade results that hold their structure through to harvest.
Increased Yield Potential
Drives carbohydrate transport and ATP energy production for bigger, heavier harvests every run.
Enhanced Resin & Oil Production
Improves terpene profile and overall flower quality for a premium finish.
Ultra-Soluble Powder
Dissolves instantly with zero residue — perfect for recirculating hydroponics, coco, and soil.

Serious Power. Serious Value.

Monster Bloom isn't just one of the strongest PK boosters on the market; it's one of the most economical too. At just ~0.3g per litre, a single container produces hundreds to thousands of litres of feed. That's a lower cost per use than most liquid bloom boosters, without sacrificing any of the performance.

How to Use Grotek Monster Bloom

When to Start: Early to mid flowering, week 3 to 4 of bloom
When to Stop: Final 1–2 weeks before harvest
Dosage: ~6g per 19L (≈0.3g per litre)
Mixing Order: Add after base nutrients and monitor EC/PPM closely
Compatible With: Hydroponics, coco coir, soil

Guaranteed Analysis

Available Phosphate (P₂O₅): 50%
Soluble Potash (K₂O): 30%

Frequently Bought Together

Rock Resinator — maximum PK + resin production for the heaviest, frostiest finish possible
T.A Pro Bloom — high-PK hardening + bio-stimulant flower activation for elite results
T.A Bloom Booster — the complete late-stage flowering stack alongside Monster Bloom
Grotek Heavy Bud — run Heavy Bud in early bloom then transition to Monster Bloom in mid-to-late bloom for a complete Grotek flowering program

Frequently Asked Questions

When do I start using Grotek Monster Bloom™ 0-50-30?

Introduce Grotek Monster Bloom™ 0-50-30 at the start of the flowering or fruiting stage — typically when you switch your light cycle to 12/12 for photoperiod plants or when pre-flowers appear on autoflowers. Early introduction primes the plant for heavy flower production. Some growers start Grotek Monster Bloom™ 0-50-30 during the final 1–2 weeks of vegetative growth to front-load the transition. Follow the feeding chart for your specific crop.

Can I use Grotek Monster Bloom™ 0-50-30 alongside my base nutrient?

Yes — Grotek Monster Bloom™ 0-50-30 is designed to complement your existing base nutrient. Add your base nutrient first, then add Grotek Monster Bloom™ 0-50-30 and any other additives. Always check total EC after mixing to ensure you are not overfeeding. If EC is too high, reduce your base nutrient dose proportionally rather than reducing Grotek Monster Bloom™ 0-50-30 — the booster's specialised chemistry should remain at full dose for best results.

Will Grotek Monster Bloom™ 0-50-30 affect my nutrient solution's pH?

Adding Grotek Monster Bloom™ 0-50-30 may shift your reservoir pH slightly. Always measure and adjust pH after adding all nutrients and additives. Target pH 5.8–6.2 for hydroponics and coco, 6.0–6.5 for soil. Use a calibrated pH meter and pH Up or pH Down solution to dial in your final reading.

Does Grotek Monster Bloom™ 0-50-30 ship fast within Australia?

Yes — Grotek Monster Bloom™ 0-50-30 ships from our Australian warehouse with fast tracked delivery Australia-wide. Most east coast orders arrive within 2–5 business days. WA, NT, and TAS orders typically arrive within 5–12 business days.