Soil Amendment Services in Colleyville, TX
Building Healthy Soil in North Texas (The Organic Way)
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Why Soil Improvement Matters in North Texas
Most North Texas soils—whether heavy clay or sandy—need improvement before plants will truly thrive. The best way to fix this is by adding organic matter like compost, along with targeted soil amendments that improve structure, support beneficial microbes, and restore natural mineral balance.
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If you’ve tried planting something and it struggled, the issue often isn’t the plant—it’s the soil.
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Across Arlington, Bedford, Colleyville, Southlake, and surrounding areas, most soils fall into two categories:
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Heavy clay soils that drain poorly and compact easily
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Sandy soils that drain too quickly and don’t hold nutrients​
In both cases, the common issue is the same: a lack of organic matter and biological activity.
Healthy soil isn’t just dirt—it’s a living ecosystem. When you improve your soil, you create the conditions where Texas native and adapted plants can establish more easily, grow stronger, and require less intervention over time.
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Choosing the Right Compost
Not all composts are the same. Different blends are designed for:
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Lawns
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Flower beds
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Vegetable gardens
While they all improve soil, choosing the right one can give you better results depending on your project.​
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Our Expertise
Marshall Grain has been the leader in organic yard care solutions for North Texas for more than 40 years, serving organic gardeners since 1980s. Our expertise comes from our direct experience in testing and refining the best organic solutions for North Texas landscapes. We think you'll agree that organic solutions are both safer for you and more effective for your lawn landscape.
Whether you choose to do it yourself, or hire us to apply it for you, we can recommend the right solutions. Contact us today to learn how we can help.
Soil Amendment Products
THE FOUNDATION
Compost
Compost is the single most important soil amendment you can add.
It helps:
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Improve drainage in clay soils
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Increase water retention in sandy soils
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Add organic matter that feeds soil life
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Create a more balanced, plant-friendly environment
Whether you're working on flower beds, vegetable gardens, or lawn areas, compost is always the starting point.
IMPROVING SOIL STRUCTURE
Expanded Shale & Lava Sand
These amendments help physically improve how your soil functions.
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Expanded Shale
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Improves drainage and aeration
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Must be mixed into the soil
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Best used when building new beds
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Long-lasting (does not break down)
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Lava Sand
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Can be applied as a top dressing
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Gradually works into the soil over time
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Helps improve soil texture and mineral content
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Typically reapplied annually
If you’re dealing with dense clay soil—which is very common in North Texas—these materials can make a noticeable difference in how your soil handles water and root growth.
FEEDING THE SOIL BIOLOGY
Humates & Dry Molasses
These amendments help stimulate beneficial microbial activity:
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Humates
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Improve nutrient availability
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Enhance soil structure over time
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​Fuels a dramatic increase in microbial activity
Dry Molasses
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Provides a food source for beneficial microbes
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Encourages stronger biological activity in the soil
When your soil biology is active, plants can access nutrients more efficiently and naturally resist stress.
RESTORING MINERAL BALANCE
Azomite & Greensand
These natural mineral amendments:
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Add essential micronutrients
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Support overall plant health
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Improve long-term soil fertility
For vegetable gardens, mineral-rich soil can also improve the nutritional value of what you grow.
FIXING SICK SOIL
Bio-Inoculants & Specialty Composts
Sometimes soil becomes unbalanced—especially after years of chemical use.
Bio-Inoculants
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Introduce beneficial bacteria and microbes
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Help suppress harmful organisms
Biologically Active Composts (like Java Turf)
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Can help restore balance in problem soils
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May assist in managing issues like Take-All Root Rot
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Healthy soil biology is one of the most important—and most overlooked—parts of a successful landscape.