Documenting Symptoms and Critical Values for Nutrient Deficiencies in Wine Grapes

Photographic images of nutrient deficiency symptoms were gathered for this project


In 2008, 150 Cabernet Sauvignon and 150 Semillion grape plants were planted in pots in sand culture. During the intervening winters these were stored in cold storage, pruned to 3 buds in the spring, and from the summer of 2009 - 2011 were treated by either providing a complete nutrient solution (30 reps per variety) or a solution lacking 1 essential nutrient (10 reps per variety/nutrient). During 2010 and 2011, each plant was photographed weekly using a black background for contrast. Read more

Year of initiation:2013
Year of completion:2014

Interpretive Summary


Plant nutrient deficiency symptoms provide useful information for farmers regarding crop health. Whenever possible, it is preferred to use chemical analysis of plant tissue to avoid severe nutrient deficiencies that occur when symptoms become visible. The goal of this project is to document nutrient deficiencies of red and white wine grapes to educate farmers regarding the value of proper fertilization.


A study was conducted from 2009 to 2011 where nutrient deficiencies were imposed on replicated red and white wine grape plants grown in pots. Deficiencies of N, P, K, Ca, Mg, S, B, Cl, Cu, Fe, Mn, and Zn were imposed on 10 replications of Cabernet Sauvignon and of Semillion plants. In addition, 30 control (full nutrition) Cabernet Sauvignon and Semillion plants were also grown for comparison.

Updates & Reports


Project Description

Project Leader

Joan Davenport, Washington State University

Project Cooperators


IPNI Staff

R. Mikkelsen


Americas \ Northern America \ USA \ Washington


education, nutrient deficiency


Nitrogen (N), Phosphorus (P), Potassium (K)