Why Soil Testing Before Starting a Big Project Matters
There's one important step that's easy to overlook when you order materials or break ground on a major outdoor project: understanding the soil you're working with.
Whether you're installing a new lawn, building a patio, creating garden beds or making other significant changes to your landscape, soil conditions can influence how well the finished project performs. What looks like ordinary dirt can vary significantly in composition, drainage, pH and nutrient levels. This could even be across different areas of the same property.
We recommend soil testing because it can give you valuable information before the work begins, helping you make smarter decisions about site preparation and the materials your project may need.
What does a soil test tell you?
The type of soil testing you need depends on your project. For lawns and gardens, testing commonly provides information about factors such as soil pH and nutrient levels. Understanding those measurements can help determine whether the soil is ready for planting or needs to be improved first.
Soil pH affects how readily plants can access nutrients. Soil structure affects root development, drainage and moisture retention. If those conditions aren't appropriate for what you're planting, simply adding fertilizer may not solve the underlying problem.
Soil texture matters, too. Soil contains varying amounts of sand, silt and clay, and that balance affects how it holds moisture, drains and supports plant roots.
Soil testing can help you choose the right materials
Knowing your existing soil conditions helps you avoid using a material simply because it seems like the obvious choice.
For example, soil that's already rich in organic matter may require a different approach than heavily compacted or clay-dominant soil. If you're installing a lawn or planting bed, you may determine that additional topsoil is necessary to create better growing conditions.
Our guide to choosing the right topsoil for your lawn or garden takes a closer look at what's in topsoil and why its composition matters.
Soil conditions can affect hardscapes
Soil testing isn't only relevant when you're growing something.
Patios, walkways, retaining walls, driveways and other hardscape projects all depend on what's beneath the finished surface. Poor soil preparation can contribute to shifting, settling and uneven surfaces over time.
For these projects, understanding site conditions helps determine how the area should be excavated and what type of base material is appropriate. For patios and walls in particular, building the right foundation is critical.
When should you test your soil?
The important thing is to test early enough so that the results can influence your plan. Finding out if there's a soil issue after materials have arrived or construction has begun can limit your options.
Consider soil testing before projects such as:
- Installing a new lawn
- Creating or significantly expanding garden beds
- Making major landscape changes
- Correcting ongoing plant-growth problems
- Addressing suspected pH or nutrient issues
- Planning significant grading or drainage work
- Beginning certain large hardscape or structural projects
For planting projects, periodic testing can also be useful as conditions change over time.
Start with the ground beneath your project
The visible part of a landscaping project may get all the attention, but long-term results often depend on what's happening below the surface. Taking the time to understand your soil before a major project can help you select better materials, prepare the site appropriately and avoid preventable problems later.
Whether you're refreshing a garden or tackling a larger outdoor renovation, starting with the right information and the right materials can make all the difference.
Ready to get your project started? Explore DL Supply's landscaping materials or stop in to discuss what you'll need for the job.
Frequently asked questions
When would further testing be needed?
For large construction or structural projects, more specialized testing may be necessary to look at other soil characteristics such as compaction and load-bearing capacity. A qualified contractor or engineer can determine what testing is appropriate for the work.
Can selecting the appropriate soil for the job have a long-term impact on your landscape?
Quality soil is an important consideration when bringing new material onto the property. DL Supply's guide to choosing quality landscaping materials explains why.
What kind of materials are available to be added to my tested soil?
DL Supply offers several soil products for different applications, including screened topsoil, unscreened topsoil and fill dirt.