Nutrient Sufficiency Range of Grape Petioles(Taken in September from Mature Vines) | ||||||||||
Variety | N | P | K* | Ca | Mg | Fe | B | Zn | Mn | |
Percent (%) | Parts per Million (ppm) | |||||||||
Vinifera | 0.8-1.4 | 0.15-0.40 | 1.2-2.3 | 1.0-3.0 | 0.6-1.50 | 15-100 | 20-60 | 15-100 | 20-200 | |
Fredonia | 0.6-1.2 | 0.15-0.40 | 0.8-1.8 | 1.0-3.0 | 0.6-1.50 | 15-100 | 20-60 | 15-100 | 20-200 | |
Other | 0.7-1.3 | 0.15-0.40 | 1.0-2.0 | 1.0-3.0 | 0.6-1.50 | 15-100 | 20-60 | 15-100 | 20-200 | |
* Potassium levels will be higher in grapes grown on sandy loam soils. |