MontanaGrow Organic Granular Silicon
Best organic soil amendment for gardeners seeking stronger, more resilient plants.
Enhance your garden's vitality with MontanaGrow Organic Granular Silicon. This 100% organic amendment, derived from volcanic tuff minerals, naturally boosts plant resilience and soil health. It strengthens roots, stems, and foliage while improving nutrient uptake and CO2 absorption for lusher growth. MontanaGrow also enhances soil moisture retention, reducing watering needs, and fortifies plants against pests and diseases by strengthening cell walls. Its slow-release granular formula is easy to apply, promoting robust development and increased yields for your vegetable garden.
$64.99
Owner Satisfaction
4.7
/ 5
Category Rank
50
/ 4348
#50 in Fertilizers
Price vs Category Average
+5%
Above average
Composition
7624
/ % Silicon Dioxide, % inert material
Who it's for
- Gardeners seeking stronger, more resilient plant structures
- Organic growers requiring certified, high-standard soil inputs
- Farmers looking to maximize existing soil nutrient efficiency
Who should skip it
- Impatient growers needing immediate, fast-acting plant results
- Budget-conscious gardeners avoiding high-volume, labor-intensive applications
- Beginners wanting to avoid complex soil pH testing
Performance breakdown
Structural Fortification
Silicon density significantly reinforces cell walls against environmental stressors.
Application Convenience
Granular form minimizes dust and ensures even, mess-free distribution.
Moisture Retention
Improves soil water-holding capacity, effectively reducing frequent irrigation needs.
Nutrient Bioavailability
Enhances cation exchange capacity for better overall nutrient uptake.
Pest Resilience
Physical barrier strengthening provides a natural defense against common garden pests.
Sustainability Profile
Sourced from volcanic minerals, offering a clean, organic soil amendment.
Key Specs
Composition
76% Silicon Dioxide, 24% inert material
Form
Granular
Release Mechanism
Slow-Release Formula
Weight
25 lb
Benefit
Improves soil texture and CEC
Application Rate (Field)
1-2 pounds per 100 sq ft
Source Material
Volcanic tuff minerals / Diatomaceous earth
Moisture Retention
High
Features
- Builds stronger roots, stems, and foliage
- Enhances chlorophyll production
- Improves soil moisture retention
- Increases pest and disease resistance
- Encourages better root development
- Reduces dust during application
- 100% organic and sustainable source
- Slow-release formula for lasting benefits
What customers say
Customers consistently view MontanaGrow as a high quality, reliable soil amendment that delivers tangible results. The primary theme is efficacy; users frequently note stronger, more resilient plants and improved yields, especially when dealing with environmental stress. While the initial cost is sometimes mentioned, the perceived long term benefits and noticeable plant health improvements solidify its strong value proposition. Application is straightforward, making it an easy addition to established organic growing routines.
Know before you buy
Silicon strengthens plant cell walls, which helps your plants stand sturdier and resist physical damage from pests or diseases. It also improves nutrient uptake and chlorophyll production, leading to more resilient, productive growth.
MontanaGrow is primarily a silicon amendment derived from volcanic tuff. While it improves soil texture and cation exchange capacity (CEC), it is generally considered pH-neutral and will not significantly alter your soil's acidity or alkalinity.
Because this is a slow-release formula, you do not need to apply it as frequently as synthetic fertilizers. A single application at the start of the season is typically sufficient to provide lasting benefits throughout the growth cycle.
You can absolutely use it in containers and raised beds. Simply adjust the application rate based on the square footage of your soil surface to ensure your plants get the same structural and moisture-retention benefits.
The product is specifically formulated to reduce dust during application. This makes it much easier and cleaner to handle compared to fine, powdered silicon amendments.
Yes, MontanaGrow improves the soil's moisture retention capabilities. By enhancing soil structure, it helps the ground hold onto water longer, which can reduce the frequency of your watering schedule.
Still have a question?
Ask Hayley anything about this product before you decide.
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$65