The Regenerative 
Garden

To optimize lawn health and growth, soils must supply a combination of essential nutrients and have the right physical properties for air, water, and root development. Here’s a summary of what lawns need and how soil testing helps guide your care decisions.

### Soil Nutrients for Lawn Health

Lawns require at least 16 essential nutrients. The most important for lawn care are:

- **Primary nutrients (needed in largest amounts):** Nitrogen (N), Phosphorus (P), and Potassium (K). These promote vigorous growth, root development, and resilience to disease and stress. Lawn fertilizers are often formulated around these three nutrients, and their proportions are shown as N-P-K ratios on fertilizer labels[1][2][5][7][9].
- **Secondary nutrients:** Calcium (Ca), Magnesium (Mg), and Sulfur (S). These are typically present in adequate amounts but can sometimes be deficient[1][7].
- **Micronutrients:** Iron (Fe), Manganese (Mn), Zinc (Zn), Boron (B), Copper (Cu), Molybdenum (Mo), Chlorine (Cl), and Nickel (Ni). Micronutrient deficiencies are rare but may occur, especially in sandy soils or after prolonged heavy fertilization without micronutrient replenishment[1][10].

Soil tests reveal which of these nutrients are abundant and which are lacking, taking the guesswork out of fertilizer selection and application[7].

### Soil Physical Properties

Healthy soil is not just about nutrients—physical structure matters, too.

- **Water Holding Capacity:** Ideal soil holds enough water for grass to thrive but drains well enough to prevent waterlogging. Clay soils often hold water well but may over-retain moisture, while sandy soils drain quickly but may dry out and lose nutrients faster[6][8].
- **Aeration:** Healthy soils allow air to circulate freely, ensuring that roots get oxygen and beneficial microbes thrive[4][8].
- **Root Penetration:** Good soil structure (loose, not compacted) enables roots to extend deeply, drawing water and nutrients from a larger volume. Compacted or poorly structured soils restrict root growth[6][8].

### Benefits of Soil Testing

Soil testing is simple, affordable, and provides actionable results. Knowing the nutrient content and pH of your soil prevents over-fertilization, waste, and potential pollution. Regular soil testing guides what, when, and how much to fertilize, tailoring your lawn care routine for optimal health and growth[7][8].

Soil testing eliminates the guesswork and ensures the right nutrients reach your lawn, promoting a lush, sustainable, and healthy turf[7][8].

Sources
[1] Turfgrass Fertilization: A Basic Guide for ... - Penn State Extension https://extension.psu.edu/turfgrass-fertilization-a-basic-guide-for-professional-turfgrass-managers/
[2] Understanding Soil Nutrients: Key Elements for Optimal Plant Growth https://growcycle.com/learn/lawn-and-garden/soil-health-and-fertilization/understanding-soil-nutrients-key-elements-for-optimal-plant-growth
[3] These Are the Top Nutrients Grass Needs to Grow http://theturfgrassgroup.com/turf-maintenance/lawn-care-with-beer-and-soap-these-are-the-top-nutrients-grass-needs-to-grow/
[4] Soil Quality Information https://extension.psu.edu/soil-quality-information/
[5] nutrients - Healthy Lawns, Clean Water https://healthylawns.suffolkcountyny.gov/lawn/fertilizing/nutrients.htm
[6] Soil Health in Wisconsin: Characteristics of Healthy Soil https://cropsandsoils.extension.wisc.edu/articles/soil-health-in-wisconsin-characteristics-of-healthy-soil/
[7] Fertilizing Your Lawn - Cornell CALS https://cals.cornell.edu/integrated-pest-management/eco-resilience/our-land-our-water/fertilizing-your-lawn
[8] 1. Soils & Plant Nutrients | NC State Extension Publications https://content.ces.ncsu.edu/extension-gardener-handbook/1-soils-and-plant-nutrients
[9] Fertilizing lawns | UMN Extension https://extension.umn.edu/lawn-care/fertilizing-lawns
[10] Living soil, healthy garden | UMN Extension https://extension.umn.edu/managing-soil-and-nutrients/living-soil-healthy-garden