- What Are Soil Amendments?<\/a><\/li>
- Different Types of Soil Amendments for Turfgrass<\/a>
- Soil Amendments for Texture and Drainage<\/a><\/li>
- Soil Amendments to Adjust Soil pH<\/a><\/li>
- Soil Amendments to Boost Fertility<\/a><\/li>
- Best Type of Soil Amendment Overall<\/a><\/li><\/ul><\/li>
- How to Improve Your Lawn Using Soil Amendments<\/a><\/li>
- FAQ About Soil Amendments<\/a><\/li><\/ul> \t\t\t<\/div> \t\t<\/div><\/div>
What Are Soil Amendments?<\/h2>
It\u2019s easy to confuse fertilizers<\/a> with soil amendments. Fertilizers add plant nutrients to the soil, whereas amendments are materials that change the condition of the soil.<\/p>
Soil amendments change your soil\u2019s physical properties so it can better support your lawn. You can use soil conditioners to improve naturally poor soils or to rebuild soils damaged by poor soil management.<\/p>
Applied correctly, soil amendments help: <\/p>
- Lower or raise the soil pH to the proper level for healthy grass (typically 5.5 to 6.5).<\/li>
- Loosen the soil to help prevent compaction and encourage root growth.<\/li>
- Add and support beneficial microorganisms<\/a> like mycorrhizal fungi and nematodes that make nutrients available for plants and improve soil structure.<\/li>
- Adjust the soil\u2019s water retention and drainage. For example, soil amendments can help make heavy clay soils more permeable, and help sandy soils retain more water.<\/li>
- Improve the soil\u2019s nutrient-holding capacity. For example, biochar\u2019s porous nature helps sandy soils absorb and store more nutrients.<\/li>
- Add beneficial nutrients to the soil. Depending on the type of soil amendment, it can act as an amendment and fertilizer.<\/li> <\/ul>
If your lawn is already established, improving the soil with soil amendments is more challenging than installing a new lawn. But still doable and with good results.<\/p>
Let\u2019s see what types of soil amendments you can use to improve your lawn.<\/p>
Different Types of Soil Amendments for Turfgrass<\/h2>
![\"Gloved](\"https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2024\/10\/Peat-moss-soil-amendments.jpeg\")
Photo Credit:\u00a0amazing studio<\/a> \/ Adobe Stock Free \/ License<\/a><\/figcaption><\/figure> Depending on how they can improve your soil, there are three main categories of soil amendments: soil texture, soil pH, and soil fertility amendments.<\/p>
Soil Amendments for Texture and Drainage<\/h4>
Soil is made of mineral particles (clay, silt, sand) and organic matter, known as \u201chumus.\u201d The proportion of sand, silt, and clay particles defines your soil\u2019s texture and how it stores nutrients and absorbs and drains water. <\/p>
Depending on the ratio of sand vs. silt vs. clay, your soil falls into one of the categories in the graphic below:<\/p>
![\"Soil](\"https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2022\/02\/Soil-texture.png\")
Infographic by Juan Rodriguez<\/figcaption><\/figure> For a deeper understanding of your soil\u2019s texture and how you can test for it at home, read our detailed guide about the six main types of soil<\/a>.<\/p>
To discuss how soil amendments can help the different types of soil, we\u2019ll focus in this article on the more unbalanced soils:<\/p>
- Sandy soil<\/strong> (over 70% sand). It\u2019s light soil with large, coarse particles, and feels gritty in your hand. <\/li>
- Clay soil <\/strong>(over 40% clay). A heavy, tight texture with fine soil particles. It feels like talc when dry, and it\u2019s sticky when wet. <\/li>
- Silty soil<\/strong> (over 80% silt). Light, fertile soil with fine particles. When wet, it feels like silk and slippery in your hand.<\/li> <\/ul>
Loamy soil is the ideal soil texture given by a mix of 40% sand, 40% silt, and 20% clay particles. Loam is the best soil for plant growth and is also suitable for turfgrasses if you maintain its good drainage and loose texture.<\/p>
Best Amendments for Sandy Soil<\/h5>
Sandy soil has low water-holding and nutrient-storing capacity, so the main aim is to improve these two characteristics. The best soil conditioners to amend sandy soil<\/a> include:<\/p>
- Well-decomposed organic amendments<\/strong> such as compost, worm castings, sphagnum peat moss, and aged manure<\/li>
- Vermiculite – <\/strong>a highly absorbent mineral soil additive that improves moisture and nutrient retention without affecting soil pH. <\/strong><\/li>
- Biochar<\/strong> – a porous carbon-like organic material that helps sandy soil absorb and store more soil nutrients.<\/li>
- Greensand<\/strong> improves water retention and also the capacity of sandy soil to store nutrients like calcium, magnesium, and potassium.<\/li> <\/ul>
Best Amendments for Clay Soil<\/h5>
In contrast to sandy soil, clay soil absorbs water slowly, but once absorbed into the soil, the ground stays moist for a long time. You\u2019ll need to use amendments that loosen its structure, creating space for more efficient water absorption, drainage, and airflow, such as:<\/p>
- Fibrous organic amendments<\/strong> such as composted wood chips, hardwood bark, and sawdust.<\/li>
- Perlite<\/strong> is an inorganic soil amendment that loosens the soil structure and improves permeability.<\/li>
- Gypsum<\/strong> binds the fine clay particles in small clumps, creating space for air and water.<\/li> <\/ul>
Best Amendments for Silty Soil<\/h5>
Similar to clay, silty soil also suffers from water drainage and airflow problems, even if it is less tight on plant roots. Less popular in homeowners’ yards, silty soil is a near-water soil found around ponds and lakes. To improve its texture, use the same soil amendments as working with clay soil.<\/p>
Soil Amendments to Adjust Soil pH<\/h4>
Soil pH tells you how acidic or basic your land is. It ranges between 0 (highly acidic) to 14 (highly alkaline) and varies with soil texture. The type of soil amendment you need for a healthy lawn depends on your soil\u2019s pH: <\/p>
- Perlite<\/strong> is an inorganic soil amendment that loosens the soil structure and improves permeability.<\/li>
- Vermiculite – <\/strong>a highly absorbent mineral soil additive that improves moisture and nutrient retention without affecting soil pH. <\/strong><\/li>
- Clay soil <\/strong>(over 40% clay). A heavy, tight texture with fine soil particles. It feels like talc when dry, and it\u2019s sticky when wet. <\/li>
- Soil Amendments to Adjust Soil pH<\/a><\/li>
- Different Types of Soil Amendments for Turfgrass<\/a>
![\"Soil](\"https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2024\/10\/Top-dressing-lawn.jpeg\")