Soil Amendment Solutions
San Marcos, CA
24-Hour Turnaround Time
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Revitalize Your Soil with Amendments
At Greatsoil LLC we're committed to helping you achieve the healthiest, most vibrant landscape possible. Our soil amendments are designed to improve your soil's texture, prevent degradation, and support the vital nutrition cycle.
We offer a comprehensive range of products that are:
- Conditioned for enhanced water retention
- Formulated to increase permeability
- Engineered to improve water infiltration
- Designed to optimize drainage
- Created to boost aeration
- Structured to enhance soil composition
Don't let poor soil hold your garden back.
Call or text Greatsoil today and let's get your soil in top shape.
The Importance of Soil Amendments
Healthy soil is the foundation of a beautiful, productive garden. Greatsoil's amendments are essential for:
- Enhancing nutrient availability to plants
- Improving soil structure for better root growth
- Increasing water retention in sandy soils
- Enhancing drainage in clay soils
- Promoting beneficial microbial activity
- Reducing soil erosion and compaction
Don't let poor soil quality limit your garden's potential. Reach out to Greatsoil and let's discuss how our amendments can transform your landscape.
Product List
List of Services
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Garden CompostItem Link
General organic compost used as a soil amendment, compost improves your soil and water retention. It also helps improve soil aeration and reduce compaction.
Compost should be mixed 1:1 with your existing soil. It can also be spread thick as a seed topper or grass fertilizer.
Price: $26.91 per cubic yard plus sales tax of $2.09
Total Price:
$29.00
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Soil Conditioner - Strong CompostItem Link
Our Soil Conditioner is the best on the market. This additive is an excellent amendment for soil preparation for the lawn. Because of its rich qualities, it should be mixed as one part conditioner to three parts of the existing soil.
To use: Rototill into ground for sod to improve soil aeration, drainage, and root penetration, creating a better foundation for the sod to establish and grow successfully.
Price: $26.91 per cubic yard plus sales tax of $2.09
Total Price:
$29.00
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Seed TopperItem Link
Specially formulated for topdressing lawns and seed beds, Seed Topper is a fine compost that promotes seed germination, moisture retention, and soil enrichment. This lightweight blend creates the perfect protective layer for newly seeded areas, ensuring strong root establishment and lush, healthy growth.
Price: $52.90 per cubic yard plus sales tax of $4.10
Total Price:
$57.00
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3G Redwood "Ligna Peat"Item Link
A premium fine redwood fiber, 3G Redwood “Ligna Peat” is an excellent organic amendment for potting mixes. It enhances soil aeration, moisture retention, and structure, providing an ideal growing environment for seedlings, container plants, and greenhouse applications.
Price: $45.48 per cubic yard plus sales tax of $3.52
Total Price:
$49.00
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Hemp Soil AdditiveItem Link
Soil additive specially formulated for growing hemp outdoors in the ground.
Price: $50.12 per cubic yard plus sales tax of $3.88
Total Price:
$54.00
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Perlite – 4 Cu. Ft. BagItem Link
Lightweight and highly porous, Perlite improves soil aeration and drainage, promoting strong root development and reducing compaction.
Total Price:
$26.00
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Vermiculite - 4 cu ft bagItem Link List Item 1
Horticultural grade Vermiculite is used in soil-less growing mediums, and as a soil amendment to improve soil aeration while retaining the moisture and nutrients necessary to feed roots, cuttings and seeds for faster growth.
Price: $57.54 per cubic yard plus sales tax of $4.46
Total Price:
$62.00
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Worm CastingsItem Link List Item 2
Worm castings manure aerates and improves the general structure of the soil while delivering valuable nutrients to your plants. Castings can also be used to repel pests that feed on plants, such as aphids and spider mites.
Price: $14.85 per cubic yard plus sales tax of $1.15
Total Price:
$16.00
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Bagged Peat Moss 3.8 Ft3Item Link List Item 3
Peat Moss is a natural material used to propagate seeds. Its lightweight, fibrous texture, and ability to retain moisture are particularly useful for seedlings. Peat Moss also adds acidity to the soil and is best used for acid-soil-loving plants such as Azaleas and Blueberries.
Price: $38.98 per cubic yard plus sales tax of $3.02
Total Price:
$42.00
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Bagged Perlite - 4.4 cu ft bagsItem Link
Perlite is most often used to improve drainage in potted plant mixes while keeping the mix lightweight. Perlite comes in prepackaged 4.4 cubic feet bags.
Price: $24.13 per cubic yard plus sales tax of $1.87
Total Price:
$26.00
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Black Lava Rock - 3/16"Item Link
Black Lava Rock is a fine and dust-free small lava rock that acts like extra coarse sand in improving drainage and aeration.
Price: $57.54 per cubic yard plus sales tax of $4.46
Total Price:
$62.00
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Black Lava Rock - 3/8"Item Link
Black Lava Rock is often used as a decorative rock or for added drainage and aeration.
Price: $57.54 per cubic yard plus sales tax of $4.46
Total Price:
$62.00
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Pumice - 3/8"Item Link
Pumice loosens the density of heavy clay garden soils. It’s a type of volcanic rock that is both lightweight and absorbent. Used as an amendment in potting mixes, it improves drainage and contributes to moisture retention.
Our Small Pumice is great for drainage in smaller pots while our Large Pumice works well in retaining moisture for larger pots or in landscaped areas. A combination of the two can be used to perfect desired drainage rates.
Price: $70.00 per cubic yard plus sales tax of $5.43
Total Price:
$75.43
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Sand - WashedItem Link
Sand improves drainage by controlling soil mixtures, especially for palms. Improved drainage keeps enough local moisture to prevent the plant from drying out. The fertilizers you add to the soil will act quickly if the amount of sand is more extensive.
Sand is also used under above-ground pools, under cement pathways to allow drainage and any area where you need a flexible base layer. Sand can also be used in children’s sandpits.
Price: $88.17 per cubic yard plus sales tax of $6.83
Total Price:
$95.00
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Flailed CoirItem Link
The outer fibre from coconuts finely ground to use as a suitable soil additive.
Used as a base or combination in propagation mixes.
50 Litre Bags Price: $25.06 per bag plus sales tax of $1.94
Total Price:
$27.00
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Flailed Coir – 50 Litre BagsItem Link
Derived from coconut husks, Flailed Coir is a sustainable, high-performing soil amendment that improves water retention, aeration, and soil structure. Ideal for potting mixes, hydroponics, and soil conditioning, this natural fiber supports healthy root development while maintaining optimal moisture levels.
Total Price:
$27.00
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0-1/4" Fir FinesItem Link
The bark of the Douglas Fir treee finely ground to use as a suitable soil additive.
Used as a base or combination in propagation mixes
Price:$89.10 per cubic yard plus sales tax of $6.90
Total Price:
$96.00
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3/16" Pumice - smallItem Link
White lightweight volcanic rock for improving drainage and aeration and making lightweight soils
Smaller size than 3/8″
Price: $70.00 per half yard plus sales tax of $5.43
Total Price:
$75.43
Experience the Greatsoil Difference
When you choose Greatsoil for your soil amendment needs, you're partnering with a company that's been rooted in quality since 1970.
Our commitment to excellence is evident in every product we offer:
- Premium products at competitive prices
- Virgin materials for uncompromised quality
- Tested and certified for your peace of mind
- Superior customer service, including bilingual support
- Flexible options with in-store pickup or delivery
- Rapid 24-hour turnaround time
As members of the USA Composting Council and San Diego Plant and Flower Association, we're committed to industry best practices. Get in touch with Greatsoil today and experience the difference for yourself.
Transform Your Soil with Greatsoil
Your garden deserves the best foundation possible. At Greatsoil, we've been helping San Marcos, CA residents achieve their landscaping dreams for over five decades. As a locally and family-owned business, we understand the unique soil needs of our community. Whether you're a seasoned gardener or just starting out, our team is ready to provide expert advice and top-quality soil amendments. Don't let another growing season pass with subpar soil. Request a call back from Greatsoil today, and take the first step towards a lush, vibrant landscape.
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