Grotek Monster Bloom, 130 g

A High-Phosphorus Boost for Mid and Late Flowering, 130 g

Mid-flower is when a plant's phosphorus demand peaks, and a base feed that isn't concentrated enough in that window can leave harvest smaller than it should be. Monster Bloom is a 0-50-30 concentrated fertilizer built to assist plants during the middle stages of flower development, its high phosphorus concentration encouraging blooming while playing a role in plant metabolism.

This 130 g size suits smaller-scale flowering programs, mixed at 6 g per 19 L of water (1 tsp per 5 gal) with every fertilizer application during bloom.

Key Features & Benefits

• 0-50-30 guaranteed analysis — encourages blooming and supports plant metabolism
• Potassium included — improves bloom and fruit quality
• Supports photosynthesis — assists starch production within the plant
• Aids ripening — helps fruit and flowers finish out the cycle
• 130 g size — matched to grow scale, from smaller batches to full commercial operations

Who Should Use Monster Bloom

Growers in the middle stages of flower development who want to increase overall harvest size and improve fruit and bloom quality will benefit from adding Monster Bloom to their feeding program.

About Grotek Monster Bloom

Monster Bloom is one of Grotek's phosphorus-and-potassium flowering formulas, manufactured by Greenstar Plant Products, a Hydrofarm subsidiary that also produces the Gaia Green fertilizer line.

Frequently Asked Questions

When should I start using Monster Bloom?

Begin application as soon as buds are forming and continue with every fertilizer application through the blooming cycle. Starting before buds have formed doesn't target the mid-flower phosphorus demand the formula is built for.

When should I stop using it before harvest?

Discontinue use 1-2 weeks before harvest, once flowers have finished developing. Continuing right up to harvest isn't part of the label directions.

What growing systems is it compatible with?

It works in soil, soilless, and water culture systems, so switching growing media doesn't require switching to a different bloom formula. Follow the mixing rate below for whichever system you're running.

How much should I mix per application?

For soil, soilless, or water culture, mix 6 g per 19 L of water (1 tsp per 5 gal) every time you fertilize during the blooming cycle. This rate matches the guaranteed 0-50-30 analysis reproduced on Grotek's own product listings.