Quick Insight Into Nitrogen & Phosphorus Status at Any Growth Stage
Target the Two Nutrients That Matter Most—When It Matters Most
Nitrogen and phosphorus are the two most essential nutrients during early plant development and reproductive stages. The Nitrate and Phosphate Only Test
gives you fast, accurate insight into how well your plants are taking up these key nutrients—without the cost of a full tissue panel.
This test is ideal for in-season nutrient checks, foliar program adjustments, or end-of-season evaluations
to understand how well your fertilizer strategy performed.
What’s Included in This Test
Choose one or both analysis types depending on your sampling strategy:
% Nitrogen (N)
– from leaf tissue
% Nitrate (NO₃)
– from petiole tissue
% Phosphorus (P)
– from leaf tissue
% Phosphate (PO₄)
– from petiole tissue
Submit leaf or petiole tissue—or both—to get a targeted look at nitrogen and phosphorus uptake and movement within the plant.
When to Use This Test
Early season: Adjust starter or foliar fertilizer programs
Mid-season: Catch emerging deficiencies before they affect yield
At harvest: Evaluate fertilization strategy and nutrient use efficiency
Sample Requirements
Leaf or Petiole Tissue: Minimum of 25–35 pieces depending on plant size
Sample Prep: Clean, fresh tissue submitted in a sealed, labeled bag
Turnaround Time: ▪️ Petioles
– 1 business day ▪️ Leaves
– 2 business days
Ideal For:
Row crop producers and specialty crop growers
Greenhouse and high-tunnel operators
Agronomists making in-season recommendations
Fertility consultants and field scouts
Order the Nitrate & Phosphate Plant Test Today
Get the nutrient data that drives yield—fast. Quick, affordable, and actionable.
Hi there! Have some questions about our company? Find the answers below.
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.
