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Grotek chart: A complete nutrition guide

Growing guides How to choose

The Grotek growing chart is the perfect guide for cannabis growers who want to go one step further by perfecting nutrient application. Grotek provides the ideal foundation for achieving a good harvest. These charts offer a detailed nutrition plan, indicating which products to use and in what quantities during each phase of the plant's lifecycle.

Grotek is a renowned Canadian brand of plant fertilisers and additives created by Greenstar Plant Products in 1998. It has developed specific growing charts for different growing media (charts for soil/substrate, charts for coco, charts for hydroponic systems, charts for autoflowering plants) and within these, charts for different plant stages (vegetative charts and flowering charts). They are designed to guide growers in the precise application of nutrients, ensuring plants receive essential elements at the right time.

Grotek Growing Chart. How to Use.

Following the Grotek growing chart is straightforward if you keep the following points in mind:

  1. Identify your growing phase: Determine whether your plant is in the seedling, vegetative growth, flowering or maturation stage.

  2. Select the Right Chart: Grotek offers specific charts for different growing media (soil, coco, hydroponics) and cultivation types (organic, autoflowering).

  4. Use the right pH: Make sure pH is within the correct range (5.5 - 6.5 for hydro and 6.0 - 7.0 for soil).

  5. Combine products correctly: Grotek has mineral and organic lines that can complement each other.

  6. Adjust the dosage: Observe your plants and, if necessary, adapt the recommended doses. Follow the chart recommendations and measure EC to avoid over-fertilising.

Grotek Chart Versions

Within Grotek's nutrient range, there are different lines compatible with various growing media. Below we present a summary of Grotek growing charts.

Grotek Growth Chart

Designed for soil or substrate cultivation, these charts are perfect for helping you balance your plants' nutrition. It is based on SoloTek Grow as the main fertilisers, complemented with Vitamax Pro and Monster Grow Pro to strengthen root health and boost flowering. It also includes specific additives to improve substrate structure and nutrient retention.

Grotek Growth Chart

Grotek Flowering Chart

Specifically for the flowering phase. It includes Solo Tek Bloom and additives such as Heavy Bud Pro and Monster Bloom Grotek that complement its action and maximise yield in this growing cycle. 

Grotek Flowering Chart

Grotek Green Line

The Grotek Green Line is focused on organic and sustainable cultivation, offering a 100% natural alternative without sacrificing yield. It uses fertilisers such as Core, Vital and GrowthMax in the growth phase, and in flowering adds products such as Core, Vital and Micro Power, ensuring complete nutrition without synthetic ingredients. This chart is ideal for those seeking ecological cultivation with reduced environmental impact and a final product of maximum quality in aroma and flavour.

Grotek Green Line

 

Grotek High Yield Chart

Designed for hydroponic growing media, this chart helps you achieve precise control of nutrient absorption in systems such as DWC, NFT or aeroponics.

  • Seedling: Gentle application of Solo Tek Grow for balanced initial development.
  • Growth: Increase in Solo-Tek Grow, with Grotek Cal Max to prevent deficiencies and Vitamax Pro to strengthen structure.
  • Flowering: Switch to Solo Tek Bloom, together with Monster Bloom, Bud Fuel Pro and Heavy Bud Pro to maximise flower production.
  • Ripening: Progressive reduction of nutrients and application of Final Flush to clean residues.

Grotek High Yield Growth Chart

Grotek High Yield Flowering Chart

 

Grotek Autoflowering Growing Chart

Autos have a short cycle and there is no room for error. Grotek knows this and has designed this chart so you make the most of each phase without overfeeding your plants.

  • Rooting: A gentle start with Solo-Tek Grow and Black Pearl Grotek to strengthen roots and minimise stress

  • Vegetative stage: Reinforced with Solo-Tek Grow and Monster Grow Pro

  • Flowering stage: Switch to Solo Tek Bloom, with support from Monster Bloom and Bud Fuel Pro for explosive flowering.

  • Harvest: Finalised with Heavy Bud Pro to improve density and resin, followed by Final Flush Grotek for a flawless root flush

With this chart, your autoflowering seeds will receive exactly what they need at each stage, ensuring incredible results in the shortest time possible.

 

Grotek Autoflowering

 

Grotek Impact Chart

This chart is designed for advanced growers looking to maximise yield with a more intensive fertilising programme. It uses Impact Grow & Bloom as a base, but boosts cultivation with a more aggressive combination of boosters and additives such as Vitamax Pro, Heavy Bud Pro, Bud Fuel Pro and Monster Bloom. Designed to adapt to demanding cultivations, the Grotek Impact chart optimises each phase of development, from growth to ripening, guaranteeing an abundant and high-quality harvest.Grotek Impact Chart

Grotek Solo Tek Chart

This chart uses as its main base the fertilisers Solo Tek Grow and Solo Tek Bloom, formulated to provide balanced development from growth through to flowering. It is complemented with key additives such as Blossom Blaster Pro to increase yield and VitaMax Plus to improve nutrient absorption.

Grotek Solo Tek Chart

Overview of Grotek's Most Emblematic Products

Seedling (Rooting and Early Development) 

  • Synergy: Mycorrhizae to boost roots.

  • Root Force: Stimulates root growth.

Growth (Vegetative Stage) 

  • Solo-Tek Grow: Base nutrients for vegetative growth.

  • Vitamax Pro: Vitamins and amino acids for development.

  • Cal-Max: Supply of calcium, magnesium and iron.

  • Growth Booster: Growth stimulator.

Flowering (Flower Formation) 

  • Solo-Tek Bloom: Base nutrients for explosive flowering.

  • Monster Bloom: Flowering booster.

  • Bud Fuel Pro: Aids transition to flowering.

  • Heavy Bud Pro: Improves aroma and resin production.

Ripening (Bulking and Finishing) 

  • Blossom Blaster: Initiates bud formation.

  • Heavy Bud Pro: Improves flavour and bud density.

  • Final Flush: Salt cleanse before harvest.

Additional Tips

  1. Constant Monitoring: Regularly observe your plants to detect signs of deficiencies or excesses.

  2. pH Adjustment: Ensure that the pH of the water and nutrient solution is in the optimal range for efficient nutrient absorption.

  3. Use of Measurement Tools: Use an EC meter to ensure that nutrient concentrations are appropriate.