TPSL Plant Natural® Soil Test

The Gold Standard in Soil Testing – Built for Serious Growers Who Demand Results

Your Soil Holds the Answers—We Help You Understand Them

Most soil tests just tell you what’s in the ground. Ours tells you what to do next —and why it matters.

The Plant Natural® Soil Test is our most advanced and widely trusted soil analysis package. Built around the Daubeny extraction method, it delivers insights that standard soil tests often miss, especially when managing crops in real-world, biologically active soils. Whether you're a commercial grower, market gardener, or serious hobbyist, this test gives you the data and expert support to grow healthier, more resilient plants.

Why This Test Outperforms Standard Lab Panels

Most labs use overly aggressive acid extractions like Mehlich III, which can over-report nutrients in alkaline soils or misrepresent what's actually plant-available. Our Daubeny extraction method simulates root uptake in living soils—giving you results that closely reflect real nutrient availability, not just chemical content.

With this test, you’re not just checking boxes—you’re investing in better decisions, better crops, and better land stewardship.

What’s Included in Your Analysis

Soil Composition & Structure

• Texture
• pH
• Carbonates (CO₃)
• Electrical Conductivity (EC)
• % Active Organic Matter

Macro & Secondary Nutrients (H₂O & CO₂-extractable)

• Nitrate-Nitrogen (NO₃-N)
• Phosphate (P₂O₅)
• Potassium (K)
• Sodium (Na)
• Calcium (Ca)
• Magnesium (Mg)

Micronutrients

• Zinc (Zn)
• Iron (Fe)
• Manganese (Mn)
• Copper (Cu)
• Boron (B)

Key Soil Ratios

• Na:Ca Ratio
• Na:Mg Ratio

Your Report Will Include:

• 2-Page Color-Coded Report – Visual breakdown of values, deficiencies, and imbalances
• Fertilizer Guidelines – Specific product-neutral recommendations for up to 2 crops of your choice
• Plant Nutrient Removal Rates – Helps you replenish based on what your crop will use
• Customized Recommendations – Address deficiencies, adjust imbalances, and improve soil function
• 15-Minute Phone Consultation – Free expert interpretation to help you apply your results with confidence

Perfect For:

• Commercial vegetable and fruit growers
• Regenerative farmers and market gardeners
• Orchard and vineyard managers
• Landscape professionals and turf managers
• Gardeners seeking long-term soil performance, not just quick fixes

Sample Requirements & Turnaround

• Minimum Sample: 3–4 cups (quart-sized Ziploc bag works fine)
• Turnaround Time: 5–7 business days from lab receipt
• Note: This package does not include a sampling kit (shipping is at your discretion)

Why Growers Trust TPSL’s Plant Natural® Soil Test

• Based on decades of agronomic research using the Daubeny root-zone simulation method
• Trusted by growers across the U.S. for accurate, plant-relevant data
• Designed to help you correct issues, not just identify them
• Backed by real people, not algorithms—call us anytime for clarification or support

Order the Plant Natural® Soil Test Today

You don’t need more data—you need answers. Take the guesswork out of soil management and move forward with clarity, confidence, and results you can grow on.