Plant Petiole Analysis

Petiole testing for mobile nutrients

This test measures:

N, P, K, S, Ca, Mg, Na, Fe, Mn, Cu, Zn, B + NO3-N

Best time to run this test:

Appropriate sampling time as suggested by information on the crop.


For grapes at flowering and potatoes during early season development (50 days after emergence) Petiole Analysis is recommended. Refer to the plant sampling guide for the appropriate sampling time or growth stage and the quantity of plant petioles to collect.


Petiole testing targets the mobile nutrients e.g. N, P, K and Mg.

Discover the Right Test for Your Farm

Unlock valuable insights tailoured to your specific needs. Identify the most relevant test for your farm and confidently make informed decisions.

Get the latest insights from lab every month.
This field is for validation purposes and should be left unchanged.
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.