TPSL Plant Natural® Soil Test + LOI
A Professional Soil Test with Expert Recommendations for Stronger, Healthier Crops
Grow Smarter with Precision Soil Insights
If you're serious about growing healthy, high-performing crops, guesswork won’t cut it. Our TPSL Plant Natural® Soil Test + LOI gives you clear, science-based answers about your soil’s health—and what to do next.
Whether you're managing a backyard garden, a specialty crop operation, or a commercial farm, this test provides the data and expert recommendations you need to maximize productivity, correct imbalances, and improve long-term soil health.
What’s Included in Your Analysis:
Soil Properties
- Texture
- pH
- Electrical Conductivity (EC)
- Carbonates (CO₃)
- % Active Organic Matter
- Total Organic Matter (LOI)
Nutrient Levels
- Nitrate-Nitrogen (NO₃-N)
- Phosphate (P₂O₅)
- Potassium (H₂O & CO₂ extractable)
- Sodium (H₂O & CO₂ extractable)
- Calcium (H₂O & CO₂ extractable)
- Magnesium (H₂O & CO₂ extractable)
Micronutrients
- Zinc (Zn)
- Iron (Fe)
- Manganese (Mn)
- Copper (Cu)
- Boron (B)
Soil Ratios
- Sodium to Calcium (Na:Ca)
- Sodium to Magnesium (Na:Mg)
What You’ll Receive:
- Color-Coded 2-Page Lab Report
Easy-to-read results with critical values highlighted for quick interpretation. - Crop-Specific Fertility Recommendations
Includes guidance for up to two crops of your choice. - Nutrient Removal Rates
Shows how much your chosen crops are likely to remove from the soil, helping guide long-term fertilization plans. - Fertilizer Application Guidelines
Tailored recommendations to help you apply the right products, at the right rates, at the right time.
Sample Requirements & Turnaround
- Minimum Sample Size: 3–4 cups of soil
- Turnaround Time: 5–7 business days from receipt at the lab
Need Help Understanding Your Results?
Optional 1-on-1 consultations are available with our Certified Crop Advisor for just $25 per 10-minute session. Get personalized answers, strategy, and next steps to make the most of your report.
📞 Call us to schedule a consultation after receiving your results.
Why Choose TPS Lab?
- Over 80 years of experience in agricultural testing
- Trusted by commercial growers, landscapers, and home gardeners
- Real human interpretation— not just raw data
- Support from Certified Crop Advisors who understand your growing conditions
Order Your Soil Test with LOI Today
Get the answers your soil has been hiding. With lab-backed data and expert guidance, you’ll finally know what to apply—and what to avoid—to grow your best crops yet.
Frequently Asked Questions
- What are your business hours?
Our office is open Monday thru Friday from 8 am to 5 pm. We do close for major holidays, so we recommend ordering your testing and sending your sample early if a holiday is coming up. You can always reach us by email. Just send us a message at info@tpslab.com
- When will I get my results?
We understand that you need your results as soon as possible. That is why we make sure to begin processing your samples as soon as they arrive at our laboratory. When the results are ready, we will email them to the email address you provided on your submittal form. The list below will give you an idea of our usual turnaround times.
Soil Tests: 5-7 Business days
Water Tests: 5 - 7 Business days
Plants Tests: 24 - 48 Hours
Compost Tests: 7 - 14 Business days
Fertilizer Tests: 3 - 5 Business days
Heavy Metals Test: 7 - 14 Business days
We offer a rush option for an additional 50% of the testing cost, but we would encourage you to give yourself time to test before you get to a point where a rush is needed.
