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How to use the Grotek feeding charts

Grotek is a Canadian brand specialized in creating nutrients, that was created by Greenstar Plant Products back in 1998 with the aim in mind to help amateur growers produce plants similar to those of professionals. Besides, the Grotek feeding charts are designed to increase yield in cannabis plants, regardless of the method of growing: soil, hydroponics, autoflowering plants and even one for growing cannabis organically.

Grotek feeding chart

All of Grotek’s fertilizer and additives are made using high quality ingredients, providing cannabis growers with a professional, simply way of obtaining incredibly impressive results. What’s more, they stock potent growth and flowering bases which contain the perfect balance of nutrients for your plants, as well as a large range of liquid and powdered additives to cover all of your plants’ needs.

Make sure to keep in mind that the recommended doses are simply a guide. Depending on the strain that you plan on growing, the climate, your experience are factors that may vary the doses. In fact, the best thing to do is to follow the feed chart but always prioritizing plants.

Grotek fertilizers and additives

Kickstart

This product is perfect for seedlings and clones thanks to its low doses of macro and micro-nutrients which increase initial growth and also help plants to bounce back after transplants.

Vitamax Pro

An excellent additive for giving your plants extra vitamins and essential amino-acids. In addition , it strengthens your plants and produces new cell walls which improve general health. By using this product, it is more difficult to stress plants.

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Vitamax Plus

This product is an upgraded version that has a slightly higher NPK than the pro version. This one is usually used when growing hydroponically, as your plants need more nutrients than usual and it’s perfect for automatic watering systems, fully dissolvable.

This handy powdered product is a growth additive that helps with development and its fully dissolvable in automatic watering systems and hydroponic tanks without causing any blockage. Moreover, its NPK is 18-36-1, so make sure that you don’t accidentally over-feed your plants.

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Bud Fuel Pro

This product is designed for the start of the flowering period as it essentially stops your plants from growing upwards and focuses more energy on producing branches and a lot more flowers. Also, it can be used in any growing medium, including hydroponics and aeroponics. Last, use it right before the flowering phase, during and until your buds start the fattening phase.

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Blossom Blaster / Pro

Blossom Blaster is a flagship offering from Grotek, boasts remarkable efficacy in enhancing flowering phases. Available in powdered form, it serves to expedite the onset of blossoming in plants. Employed at the inception of flowering stages, it effectively reduces node length while augmenting pistil proliferation. Esteemed for its potency, this product is enriched with substantial levels of phosphorus and potassium. However, it is not compatible with automated watering systems or hydroponic setups.

In addition, Grotek has introduced Blossom Blaster Pro, a variant designed to achieve identical results with a diminished NPK ratio, packaged in a liquid formulation. Particularly tailored for hydroponic cultivation, the Pro iteration of Blossom Blaster is indispensable for optimal results in such systems.

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Heavy Bud Pro

This product stands out as the ideal solution for those seeking to amplify bud size and enhance flavor profiles. By infusing plants with additional sugars and carbohydrates, this product profoundly influences terpene synthesis, ultimately elevating flavor, aroma, and effects. Its synergy with Monster Bloom yields exceptional results, culminating in the cultivation of truly remarkable flowers.

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Monster Bloom

Distinguished by its elevated PK content, it targets the critical bud fattening phase of plant development, typically occurring during the fourth or fifth week of flowering. Remarkably, its application triggers rapid and tangible effects, evidenced by a notable increase in bud density and compactness. Even in minute doses, this additive proves instrumental in maximizing final yields.

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Final Flush

It emerges as a specialized liquid formulation tailored to eliminate salt and nutrient residues. Enriched with citric and ascorbic acids, it efficiently dissolves lingering deposits within the substrate and roots of plants, rendering it particularly suitable for aeroponic and hydroponic systems. Moreover, it serves as a reliable remedy in instances of inadvertent overfeeding, ensuring optimal plant health and performance.

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Grotek Organics Nutrients

Grotek has introduced a range of products specifically tailored for organic cultivation – a departure from their predominantly mineral-based offerings. Now, enthusiasts can harness the professional-grade results synonymous with Grotek while adhering to a completely organic regimen for their marijuana plants.

Core – Vital – Micro Power

These three products, when used together in varying quantities, serve as the foundational nutritional components during both the growth and flowering stages of plant development. They are indispensable for organic cultivation.

Core, with its mild NPK composition, bolsters plant vigor and enhances substrate quality, while Vital supplements your plants with an extra dose of calcium, fortifying their cells to channel more energy into flower production (for coco cultivation, a slight increase in Vital dosage is recommended). Then, Micro Power enriches your plants’ soil, addressing any potential micronutrient deficiencies common in organic cultivation.

When combined, these three products form the perfect nutritional base for marijuana plants, ensuring success and organically delectable buds.

Root Force

This natural root stimulant accelerates root growth, allowing plants to expand their root systems maximally within their substrate. It imparts additional strength to plants, enhancing nutrient absorption, and is particularly beneficial after transplanting to rejuvenate plant vigor.

Growth Max

This natural additive, infused with extracts of seaweed, provides plants with a wealth of nutrients owing to its natural origin. It also contains fast-assimilating carbohydrates, enabling maximal nutrient uptake and plant development. Moreover, it amplifies final resin production.

Rype

Employed during flowering, Rype serves as an organic bulking agent. Its application induces a substantial increase in plant and flower size, enriching them with carbohydrates and sugars while significantly boosting resin production.

Black Pearl

Presented in granular form, Black Pearl is a soil additive that activates soil microorganisms when thoroughly mixed into the substrate. Not recommended for use in automated watering systems due to the risk of clogging, it can also be employed to rejuvenate previously used soils.

Synergy

A blend of mycorrhizae, Synergy fosters beneficial microbial activity in your plant’s substrate, thus benefiting root health and overall plant vigor through a symbiotic relationship.

How to follow the Grotek feeding charts

Grotek provides customers with four distinct charts for guidance: one for soil or coco cultivation, another for hydroponic setups, a third exclusively featuring organic products, and a final one tailored for autoflowering plants.

For seasonal plants in growth, four distinct stages stand out:

  • Seedling: This is the initial growth stage after the seed germination. It allows the young plant to start developing its first leaves and roots, which are crucial for photosynthesis and the absorption of nutrients from the soil.
  • Transplant: This stage involves moving the plant from its initial location to a new place or container. It is useful for providing the plant with more space to grow, better soil, or more suitable conditions for its development.
  • Growth: In this phase, the plant increases in size and mass, developing more leaves, stems, and roots. This stage is crucial for strengthening the plant, allowing it to accumulate resources and energy for reproduction and flowering.
  • Pre-flowering: This stage occurs just before the plant starts to produce flowers. It serves as a preparation period where the plant shifts its focus from general growth to the generation of reproductive structures. During pre-flowering, changes in the plant can be observed, such as the development of flower buds.

For plants with longer flowering periods, refer to the flowering chart, using the last week before root flushing as a reference. Always remember to perform a thorough root flush before harvesting. Also, note that the quantities indicated are per liter of water.

Soil/Substrate – Grotek feeding chart

GROWTH PHASE
NameSaplingTransplantGrowthPre-Flowering
Kick Start2ml/L
Black Pearl1g/L Soil
Solo-Tek Grow1 ml/L2 ml/L2 ml/L
Vitamax Pro1 ml/L1 ml/L1 ml/L
Monster Grow Pro0,10 g/L0,10 g/L
Bud Fuel Pro1 ml/L
Total EC1,140,961,892.13
Total PPM5704799471065

FLOWERING PHASE
NameWeek 1Week 2Week 3Week 4Week 5Week 6Week 7Week 8
Solo-Tek Bloom2ml3ml2ml3ml3ml3ml2mlRoot Flush
Vitamax Pro1ml1ml1ml1ml1ml1ml1mlRoot Flush
Bud Fuel Pro2ml2ml2ml2mlRoot Flush
Blossom Blaster Pro1ml1ml1mlRoot Flush
Heavy Bud Pro2ml3ml2ml3mlRoot Flush
Monster Bloom0,10g0,10g0,10g0,10gRoot Flush
Total EC2,403,152,403,553,423,282,33Root Flush
Total PPM1200157512001778171016431166Root Flush

Hydroponics – Grotek feeding chart

GROWTH PHASE
NameSaplingTransplantGrowthPre-Flowering
Kick Start2ml1ml
Solo-Tek Grow1ml2ml2ml
Vitamax Plus1ml2ml2ml
Monster Grow Pro0,10g0,20g
Total EC1,442,012,25
Total PPM57072010051126
FLOWERING PHASE
NameWeek 1Week 2Week 3Week 4Week 5Week 6Week 7Week 8
Solo-Tek Bloom2ml2ml2ml2ml2ml2ml2mlRoot Flush
Vitamax Plus2ml2ml2ml2ml2ml2ml2mlRoot Flush
Blossom Blaster Pro2ml2ml1mlRoot Flush
Monster Bloom0,20g0,20g0,20gRoot Flush
Total EC2,402,202,052,792,792,792,52Root Flush
Total PPM1200109510951025139513951260Root Flush

Organic ChartGrotek feeding chart

GROWTH PHASE
NameSaplingTransplantGrowth for early flowering plantsPre-Flowering for late flowering plants
Core1ml1ml2-3ml3-4ml
Vital1ml1ml3ml2ml
Micro Power1ml1ml2ml1-2ml
Root Force0,5ml0,5ml1ml
Growth Max0,5ml0,5ml2ml1ml
Rype1-2ml
Black Pearl20-40ml
Soil
20-40ml
Soil
Synergy0,25ml/L
Soil
0,25ml/L
Soil
0,25ml/L
Soil
Flowering phase

NameWeek 1Week 2Week 3Week 4Week 5Week 6Week 7Week 8
Core4ml4ml4ml4ml4ml3ml3mlRoot
Flush
Vital2ml3ml3ml3ml3ml2ml2mlRoot
Flush
Micro Power2ml2ml2ml2ml2ml1ml1mlRoot
Flush
Root Force2ml2ml2ml1ml1ml1mlRoot
Flush
Growth Max1ml1ml1mlRoot
Flush
Rype1ml2ml2ml3mlRoot
Flush
Black Pearl20-40ml
Substrate during transplant
Root
Flush
Synergy0,25g/L
Substrate during transplant
Root
Flush

Autoflowering ChartGrotek feeding chart

NameWeek 1Week 2Week 3Week 4Week 5Week 6Week 7Week 8Week 9Week 10
Black Pearl1g/L
Soil
Solotek Grow2ml2ml2ml
Monster Grow Pro0,15g
Bud Fuel Pro2ml2ml2ml
Solotek Bloom3ml3ml3ml2ml2ml
Blossom Blaster Pro1ml
Heavy Bud Pro2ml2ml2ml2ml
Final Flush3ml
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Erik Collado

Con más de 10 años de experiencia en la industria del cannabis, sus experiencias y aprendizaje son la base del éxito de GB The Green Brand.

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