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You can find the best silica brands at Groindoor.com. We feature products from top manufacturers, including Aptus, Growth Science, Soul synthetics, X Nutrients, and more. at some of the lowest prices.

What is silica?

Many growers regard silica as a Supervitamin. Amazing for hydroponic growing, this product can introduce some massive efficiencies to your growing operation.

What does it do for plants?

Silica helps plants in numerous ways making them stronger, healthier, and sturdier. Let us look at some reasons why gardeners use silica supplements:

  • Bigger and Stronger Stems
  • Increased Resistance to Pathogens and Pests
  • Stronger Cell Walls
  • Improved Metabolic Functions
  • Increased Resistance to Environmental Stress

Is silica actually useful for plants?

Silica should be used for plants growing in a hydroponic system during all stages from seedling to harvest. While silica is more effective in hydroponic setups, it doesn’t mean that it cannot be used in soil growing.

You can use silica both as a foliar spray and a root feed. Experts recommend using it as a foliar spray because it enhances a plant’s absorption ability. It is important to remember that it increases the pH of the plant, and should be applied as the last nutrient.

Check out our Learning Center and read our blog on a complete guide to using silica for plants and also our other blog on the relationship between nutrients and pH.

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    Alchemist Stout MSA, 55 Gallon

    Alchemist Product Documents Alchemist Stout MSA MSDS Monosilicic acid (H4SiO4 aka ortho-silicic acid), the form found in Stout MSA, is the most bioavailable form of silicon. Stout MSA is immediately available to your plants and is stable over a...

    $2,394.06 $1,623.70
  • Alchemist Stout MSA, 5 Gallon Alchemist Stout MSA, 5 Gallon

    Alchemist Stout MSA, 5 Gallon

    Alchemist Product Documents Alchemist Stout MSA MSDS Monosilicic acid (H4SiO4 aka ortho-silicic acid), the form found in Stout MSA, is the most bioavailable form of silicon. Stout MSA is immediately available to your plants and is stable over a...

    $298.99 $197.43
  • Alchemist Stout MSA, 2.5 Gallon Alchemist Stout MSA, 2.5 Gallon

    Alchemist Stout MSA, 2.5 Gallon

    Alchemist Product Documents Alchemist Stout MSA MSDS Monosilicic acid (H4SiO4 aka ortho-silicic acid), the form found in Stout MSA, is the most bioavailable form of silicon. Stout MSA is immediately available to your plants and is stable over a...

    $179.85 $130.54
  • Alchemist Stout MSA, 1 Gallon Alchemist Stout MSA, 1 Gallon

    Alchemist Stout MSA, 1 Gallon

    Alchemist Product Documents Alchemist Stout MSA MSDS Monosilicic acid (H4SiO4 aka ortho-silicic acid), the form found in Stout MSA, is the most bioavailable form of silicon. Stout MSA is immediately available to your plants and is stable over a...

    $83.68 $60.94
  • Alchemist Stout MSA, Quart Alchemist Stout MSA, Quart

    Alchemist Stout MSA, Quart

    Alchemist Product Documents Alchemist Stout MSA MSDS Monosilicic acid (H4SiO4 aka ortho-silicic acid), the form found in Stout MSA, is the most bioavailable form of silicon. Stout MSA is immediately available to your plants and is stable over a...

    $23.81 $17.39
  • Mad Farmer Silica Mad Farmer Silica

    Mad Farmer Silica

    Mad Farmer’s Silica provides plants with additional levels of silicon and potash. Silicon helps promote strong plant tissue by fortifying the cell walls. This increases the rigidity of stems and stalks which allow the plants to bear more weight and...

    $224.99 $161.50
  • Mad Farmer Silica 1 Gallon

    Mad Farmer Silica 1 Gallon

    Mad Farmer’s Silica provides plants with additional levels of silicon and potash. Silicon helps promote strong plant tissue by fortifying the cell walls. This increases the rigidity of stems and stalks which allow the plants to bear more weight and...

    $41.99 $31.95
  • Cutting Edge Solutions Bulletproof SI, Quart

    Cutting Edge Solutions Bulletproof SI, Quart

    Cutting Edge Solutions Product Documents Cutting Edge Solutions™ Bulletproof SI MSDS CES Basic Bulletproof Si Feed Chart CES Basic Bulletproof Si Soil & Coco Feed Chart CES Professional Bulletproof Si Feed Chart CES Professional Bulletproof Si...

    $47.99 $23.32
  • Cutting Edge Solutions Bulletproof SI, Gallon

    Cutting Edge Solutions Bulletproof SI, Gallon

    Cutting Edge Solutions Product Documents Cutting Edge Solutions™ Bulletproof SI MSDS CES Basic Bulletproof Si Feed Chart CES Basic Bulletproof Si Soil & Coco Feed Chart CES Professional Bulletproof Si Feed Chart CES Professional Bulletproof Si...

    $75.99 $68.85
  • Cutting Edge Solutions Bulletproof SI, 6 Gallon

    Cutting Edge Solutions Bulletproof SI, 6 Gallon

    Cutting Edge Solutions Product Documents Cutting Edge Solutions™ Bulletproof SI MSDS CES Basic Bulletproof Si Feed Chart CES Basic Bulletproof Si Soil & Coco Feed Chart CES Professional Bulletproof Si Feed Chart CES Professional Bulletproof Si...

    $276.99 $228.20
  • Cutting Edge Solutions Bulletproof Si, 55 Gallon

    Cutting Edge Solutions Bulletproof Si, 55 Gallon

    Cutting Edge Solutions Product Documents Cutting Edge Solutions™ Bulletproof SI MSDS CES Basic Bulletproof Si Feed Chart CES Basic Bulletproof Si Soil & Coco Feed Chart CES Professional Bulletproof Si Feed Chart CES Professional Bulletproof Si...

    $2,275.99 $1,875.18
  • Cutting Edge Solutions Bulletproof SI, 2.5 Gallon

    Cutting Edge Solutions Bulletproof SI, 2.5 Gallon

    Cutting Edge Solutions Product Documents Cutting Edge Solutions™ Bulletproof SI MSDS CES Basic Bulletproof Si Feed Chart CES Basic Bulletproof Si Soil & Coco Feed Chart CES Professional Bulletproof Si Feed Chart CES Professional Bulletproof Si...

    $137.99 $113.69
  • X Nutrients Silica, 5 Gallon

    X Nutrients Silica, 5 Gallon

    X Nutrients Product Documents X Nutrients™ Feeding Schedule Silica provides increased levels of potassium and silicon helping to strengthen plant tissue by building stronger cell walls. This helps plants to combat adverse conditions such as...

    $185.00 $123.72
  • X Nutrients Silica, 1 Quart

    X Nutrients Silica, 1 Quart

    X Nutrients Product Documents X Nutrients™ Feeding Schedule Silica provides increased levels of potassium and silicon helping to strengthen plant tissue by building stronger cell walls. This helps plants to combat adverse conditions such as...

    $42.00 $14.95
  • Grotek Pro Silicate, 4 Liter

    Grotek Pro Silicate, 4 Liter

    Grotek Product Documents Grotek Pro Silicate MSDS Pro-Silicate is a nutritional silicate additive containing potassium and silicon. It helps keep the plants upright, positioning the leaves correctly for maximum light exposure that ultimately leads to...

    $69.06 $38.41
  • Grotek Pro Silicate, 23 Liter

    Grotek Pro Silicate, 23 Liter

    Grotek Product Documents Grotek Pro Silicate MSDS Pro-Silicate is a nutritional silicate additive containing potassium and silicon. It helps keep the plants upright, positioning the leaves correctly for maximum light exposure that ultimately leads to...

    $213.56 $168.66
  • Grotek Pro Silicate, 1 Liter

    Grotek Pro Silicate, 1 Liter

    Grotek Product Documents Grotek Pro Silicate MSDS Pro-Silicate is a nutritional silicate additive containing potassium and silicon. It helps keep the plants upright, positioning the leaves correctly for maximum light exposure that ultimately leads to...

    $40.71 $16.95
  • Grotek Pro Silicate, 10 Liter

    Grotek Pro Silicate, 10 Liter

    Grotek Product Documents Grotek Pro Silicate MSDS Pro-Silicate is a nutritional silicate additive containing potassium and silicon. It helps keep the plants upright, positioning the leaves correctly for maximum light exposure that ultimately leads to...

    $109.25 $94.80
  • Growth Science Strength, Quart

    Growth Science Strength, Quart

    Growth Science Product Documents Growth Science Strength MSDS Growth Science Nutrients StrengthStrength provides your plants with Silica for an increased resistance to stress, helping to improve overall yield. Use Strength throughout the vegetative...

    $44.99 $16.18
  • Growth Science Strength, Gallon

    Growth Science Strength, Gallon

    Growth Science Product Documents Growth Science Strength MSDS Growth Science Nutrients StrengthStrength provides your plants with Silica for an increased resistance to stress, helping to improve overall yield. Use Strength throughout the vegetative...

    $49.99 $40.46
  • Growth Science Strength, 6 Gallon

    Growth Science Strength, 6 Gallon

    Growth Science Product Documents Growth Science Strength MSDS Growth Science Nutrients StrengthStrength provides your plants with Silica for an increased resistance to stress, helping to improve overall yield. Use Strength throughout the vegetative...

    $255.99 $179.89
  • Growth Science Strength, 2.5 Gallon

    Growth Science Strength, 2.5 Gallon

    Growth Science Product Documents Growth Science Strength MSDS Growth Science Nutrients StrengthStrength provides your plants with Silica for an increased resistance to stress, helping to improve overall yield. Use Strength throughout the vegetative...

    $114.99 $85.33
  • Aptus Fasilitor, 20 Liter

    Aptus Fasilitor, 20 Liter

    Aptus Product Documents Aptus Fasilitor SDS Aptus Feeding Schedule FASILITORNutrition Manager and Plant Strengthener About Fasilitor As the flagship of the Aptus product lineup, Fasilitor is extremely concentrated, pure, and fast-acting. While it is a...

    $5,238.00 $4,774.34
  • Aptus Fasilitor, 5 Liter

    Aptus Fasilitor, 5 Liter

    Aptus Product Documents Aptus Fasilitor SDS Aptus Feeding Schedule FASILITORNutrition Manager and Plant Strengthener About Fasilitor As the flagship of the Aptus product lineup, Fasilitor is extremely concentrated, pure, and fast-acting. While it is a...

    $2,134.00 $1,498.47

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