Central Sierra
University of California
Central Sierra

Grapevine Nutrition

petiolesampling
Petiole sampling at bloom helps determine vine nutritional needs. Sample the leaf petioles opposite flower clusters.

General nutrition links:

Boron:
Phosphorus:
Zinc:
Grape Nutritional Deficiency Images courtesy of Pete Christensen

Click on an image for a closer view and to scroll through the pictures.

B def Merlot leaves
B def Merlot leaves
K def Cab franc
K def Cab franc
P def Cab Sauv.
P def Cab Sauv.
-Zn Superior Sdls. severe
-Zn Superior Sdls. severe
Mg def Zinfandel
Mg def Zinfandel
Webmaster Email: cecentralsierra@ucdavis.edu