Grotek Monster Grow Pro: Monster Bloom’s little brother, for growth
If Monster Bloom is a flowering classic, Monster Grow Pro is its counterpart for the vegetative phase. This ultra-concentrated Grotek powder gives plants a boost just when they are building everything that will carry the harvest: roots, stems and foliage. A few grams a week is all it takes.
A mineral and organic formula
- NPK 18-36-1: plenty of nitrogen for foliage, and even more phosphorus for roots and plant energy.
- Hydrolysed soy protein, an organic source of nitrogen.
- Kelp extract, complementing the mineral formula.
- Secondary roots: Grotek highlights its role in building a well-branched root system.
Specifications
| Brand | Grotek (Canada) |
| Type | Soluble powdered growth booster |
| NPK | 18-36-1 |
| Ingredients | Diammonium phosphate, hydrolysed soy protein, kelp extract, potassium hydroxide |
| Growing media | Soil, coco and hydroponics |
| Phase | Growth and pre-flowering |
| Sizes | 130 g and 500 g |
Dosage and directions
- Manufacturer’s dose: 3 g per 19 litres of water (about 0.15 g per litre), roughly two thirds of a teaspoon.
- Frequency: once a week during vegetative growth and into pre-flowering.
- Mixing: weigh the powder rather than guessing, dissolve it in a little water, then add it to the reservoir.
- Caution: highly concentrated. Do not exceed the dose and keep an eye on the EC.
The Grotek growth programme
Monster Grow Pro is added to your grow base nutrient, such as Grotek Solo-Tek Grow. Add Grotek Vitamax Plus for vitamins. Once flowering starts, move on to its big brother, the PK booster Grotek Monster Bloom. Browse the full range in our Grotek nutrients category.
FAQ
What’s the difference between Monster Grow Pro and Monster Bloom?
Monster Grow Pro (18-36-1) is for growth, with plenty of nitrogen and phosphorus. Monster Bloom (0-50-30) is for flowering, with no nitrogen.
Monster Grow Pro or Growth Booster?
Both boost growth. Monster Grow Pro also contains organic ingredients (kelp, soy protein); Growth Booster is a purely mineral formula, NPK 16-40-0.
How long does a 130 g tub last?
A long time: at 3 g per 19 litres, 130 g makes more than 800 litres of solution.


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