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Plant Sap Analysis

Plant sap testing is more efficient and effective when accessing crop information than soil or tissue testing. It can help you achieve maximum yield with adjustments to amendments and additives regularly. 
This type of testing is helpful during different growth stages, as crop nutrient demands can change significantly. By analyzing the sap of your plants, you can accurately adjust nutrient amendments to correct any imbalances or deficiencies. This information will help you achieve your yield goals while optimizing amendment input costs.

What is Plant Sap Analysis?

Sap analysis measures the active liquids in the vascular tissues, the xylem and phloem. It provides a nearly real-time assessment of the nutrients available in the plant. At NEW AGE, sap is extracted through linear pressure, without compromising the integrity of the leaf. By using methods that do not include mastication, heat, acids, or solvents, we get a clear view of what is active in the plant at the time of sampling. Different pressures are also used for different crop types to ensure leaves and cellular structures remain intact.

Guard Cell
Cross Leaf Section - Jose Aburto
Upper Epidermis
Palisade mesophyll cells
(contain chloroplasts)
Bundle Sheath
Spongy Mesophyll Cells (contain chloroplasts)
Lower Epidermis
Illustrated by our in-house artist, Jose Aburto. Prop. of NEW AGE Laboratories

When conducting sap analysis, it is essential to maintain the integrity of the samples from the moment the leaves detach from the plant. Following sampling and handling protocols for each crop ensures leaf integrity. To address these concerns, NEW AGE offers an overnight shipping program and a range of sampling guides to keep the samples fresh until they reach the laboratory.

Tomato Leaf Sap Sampling Guide
General Leaf Sap Sampling Guide

Nutrient Mobility

NEW AGE Laboratories mobile and immobile nutrition wheel

NEW AGE Laboratory Nutrient Chart

Analysis of sap can detect nutrient issues often long before visible symptoms appear. As an example, Nitrogen (N), being highly mobile, will produce a deficiency symptom initially in the old leaves if the plant has been nitrogen deficient for a prolonged period. Old leaves start to turn yellow due to lack of chlorophyll synthesis. On a sap report, N deficiency is identified, often long before visual symptoms occur. When higher amounts of N are measured in the new leaf than the old leaf, this means the plant is remobilizing N from old leaves to meet the high demand in the new leaves, identifying when not enough N uptake is available. An excess of N is common in sap results as well, showing more N in the old leaves than in the new. When an excess of N is persistent in sap, this points to an area where fertilizer rates can be potentially decreased and production problems with pests and diseases associated with excess N can be avoided. This comparison of new vs old leaves is applicable to identify deficiencies and excesses of all mobile nutrients. The unique N information available from sap analysis also includes N conversion efficiency analysis, exclusively through NEW AGE Laboratories' sap analysis.

Nitrogen Conversion Efficiency parameter on plant sap analysis report

For more information on our sap parameters and how they may affect your yield, check out the tabs below.

Brix content, indicating the concentration of soluble solids such as sugars in plant sap or fruit juice, directly influences plant health and quality. Monitoring Brix levels is crucial for assessing plant vigor, fruit ripeness, and overall nutritional value. It enables growers to optimize cultivation practices, such as irrigation and fertilization, to enhance yield, flavor, and resistance to pests and diseases, ultimately ensuring superior crop quality and market competitiveness.

  • Detect nutritional imbalances four to five weeks earlier than tissue analysis.


  • Manage nutrition and fix the cause of problems before they negatively affect production.


  • Determine which nutrients and product sources work.


  • Understand different nutritional  requirements between different cultivars that can affect your ROI.


  • Optimized use of resources and better results. 



Comparison Sap

We gain a deeper understanding of a plant's nutrient content by comparing the older and newer growth instead of assuming uniformity. Analyzing the sap between leaves of different growth stages can provide additional insight into how the availability of nutrients has changed throughout the season. Doing this is particularly useful for growers who cultivate plants without soil, such as hydroponic and aeroponic growers, as it helps them track how their plant's nutrient uptake changes over time.

Translocative Sap

Translocative sap analysis combines the benefits of individual sap testing with the trusted knowledge that soil testing provides. We compare the nutrients available in the soil with those your plants absorb through your roots. This type of test is most informative when done periodically throughout the growing season. It allows you to monitor what nutrients your crops absorb from their soil amendments, enabling you to make informed management decisions when they matter the most.

Individual Sap

By conducting individual sap tests, we can provide a detailed analysis of the nutrients flowing through your plants' xylem and phloem. This method provides a more precise representation of nutrients available to your plant than soil and tissue tests.


Brix | pH | EC (Electrical Conductivity) | Aluminum (Al) |     Boron (B) | Calcium (Ca) | Chlorine (Cl) | Copper (Cu) | Iron (Fe) | Magnesium (Mg) | Manganese (Mn) | Molybdenum (Mo) | Nickel (Ni) | Nitrogen (As Nitrate and Ammonia) |    Phosphorus (P) | Potassium (K) | Selenium (Se) | Silicon (Si) | Sodium (Na) | Sulfur (S) | Zinc (Zn)

Discounted Sap Bundles

Our bundles make it easier and more affordable to harness the benefits of sap analysis at every stage of your crop's growth. 


Single Pair (New & Old)


4% discount

Bundle 25 Pairs


10% discount

Free 1 hr. Support

Bundle 50 Pairs


15% discount

Free 2 hr. Support

Bundle 100 Pairs